JPS605667B2 - amorphous magnetic alloy - Google Patents

Description

[Detailed description of the invention]

The present invention particularly relates to an amorphous magnetic alloy suitable as a magnetic head material. Conventionally used magnetic head materials include metal alloys such as permalloy or ferrite for audio use.
For video use, single crystal ferrite or hot pressed ferrite are available from the viewpoint of wear resistance. However, from the viewpoint of reducing magnetocrystalline anisotropy and magnetostriction, there is a limit to the size of these materials, with the magnetic flux density that can be obtained being at most 6,000 to 800 s. It is known that it is unsuitable as a head material for recording (such as increasing the coercive force of magnetic powder for tape). Therefore, there is an urgent need to develop magnetically soft materials with higher magnetic flux density. Metal amorphous (
Since the amorphous (amorphous) material does not have magnetocrystalline anisotropy, it has an advantage that the above-mentioned crystalline head material does not have. Then, by thermal annealing at a specific temperature below the crystallization temperature,
The softness (ie, decrease in coercive force Hc, increase in magnetic permeability) of the metal amorphous material is greatly increased. Some of these amorphous materials are known to have a fairly small Hc and a large magnetic flux density, but when looking at the Hc and magnetic permeability after resin molding from the viewpoint of practical head materials, these characteristics There is a phenomenon of significant deterioration. This is remarkable in an amorphous material mainly containing Fe as a metal element. The reason for this is believed to be that the amorphous material containing Fe as a main component has the advantage of having a large saturation magnetic flux density, and at the same time has a large magnetostriction constant. This magnetostriction constant combines with internal or external stress to produce magnetic anisotropy, resulting in deterioration of magnetic permeability, Hc, etc. Therefore, in order to obtain a head material whose magnetic properties do not deteriorate due to processing etc., the magnetostriction constant should be as low as possible. Must be small. In view of these circumstances, the present invention was invented based on a completely new idea.
Amorphous material consisting of 2 to 18 t% of Cr, Si and B with a total amount of 10 to 27 at% (however, Si:B = 75 to 5:25 to 95 in atomic ratio), and the balance being Fe. This relates to magnetic alloys. With this configuration, the crystallization temperature of the alloy can be raised by Si and B, and excellent characteristics can be obtained without significantly lowering the magnetic Curie temperature and saturation magnetic flux density, while the magnetic flux constant can be significantly increased by Cr. Therefore, it is possible to provide a high magnetic flux density material having magnetic properties with excellent resistance to external stress. The second invention is (E) 2 to 1% Cr,

[o- Sj and B in a total amount of 10 to 27 at% (however, Si:B = 75 to 5:25 to 95 in atomic ratio), Fe, and at least one of Co and Ni The remainder consists of
% or more, and the total amount of Co and Ni is 5 t% or less of the entire remainder. With this configuration, the crystallization temperature of the alloy can be raised by Si and B, and excellent properties can be obtained without significantly lowering the magnetic Curie temperature and saturation magnetic flux density, while the magnetostriction constant can be significantly reduced by Cr. Therefore, it is possible to provide a material with a high magnetic flux density and excellent magnetic properties with respect to external stress, and the balance is composed of Fe and at least one of Co and Ni. Therefore, the degree of freedom in selecting the constituent elements of the alloy is increased. According to the present invention, Cr is added in the above range in an amorphous metal material containing Si and B as amorphous forming elements, with the remainder being Fe (or at least one of Fe, Co, and Ni). As a result, a phenomenon was discovered in which the magnetostriction constant, especially at room temperature, decreased significantly. That is, as is clear from the comparative examples and examples described later,
The strain constant was 35 x 10-6 when no Cr was added, but it was reduced to, for example, 11 x 10-6 by adding Cr. Further, according to the present invention, by using B and Si as the amorphous forming elements, the crystallization temperature can be increased, and excellent characteristics can be obtained in which the magnetic Curie point and spontaneous magnetization do not decrease significantly. The reason why the ratio of each component of the alloy according to the present invention is limited to the above range is as follows.
Of course, the reason for setting it as 1 t% (atomic %: percentage of the number of atoms) is because
If it is less than %, the effect of Q addition will be poor, and 1 string t
%, the magnetic Curie point will drop too much (that is, below room temperature) and the amount of magnetization will also drop too much. In this case, from the viewpoint of stability, it is desirable that the Curie point be 100 pm or more, and therefore the amount of Cr is desirably 1 t % or less. In addition, the total amount of Si and B is 10 to 27
The reason for using at% is that this is the general range in which it can be added; if it deviates from this range, it will be difficult to obtain an amorphous alloy. This is because only a compound is formed, and the desired amorphous state is formed, which is surprising. A more preferable total amount of Si and B is 15 to 2 $t%. In addition, the atomic ratio of Si:B is 5 to 7.
The reason for setting the ratio to be 5:25 to 95 is that if it deviates from this range, it will be difficult to form an amorphous state, and if the proportion of B exceeds 95%, the crystallization temperature will become low. Note that in the alloy according to the present invention, a portion of Fe may be replaced with a ferromagnetic paper transition metal such as Co and/or Ni. In this case, the percentage of replacement can be up to 50%. Furthermore, a portion of the above-mentioned amorphous forming elements Si and B may be replaced with other amorphous forming elements such as P, C, and Q. In this case as well, the substitution ratio can be kept at 50% or less, but it is desirable that the amount of the substituted element be as small as possible. EXAMPLES Below, the present invention will be described in more detail with reference to Examples, with reference to Comparative Examples. Comparative Example Before devising the present invention, the present inventors had developed an amorphous metal material containing P and C as amorphous forming elements, with the remainder being Fe, by replacing a portion of Fe, P or C with 2
It has been found that the magnetostriction constant at room temperature is significantly reduced by substituting with ~12t% of Cr. The effect of this Cr addition is that Cr in the alloy according to the present invention
Although the effect is almost the same as that of addition, as will be described later, there are still problems that need to be improved regarding crystallization temperature, magnetic Curie point, and spontaneous magnetization. Here, to explain the method for measuring the strain constant, first, from a tape-shaped amorphous material with a width of 10 skin and outside, a disk with a diameter of 6 and 0 is punched out using an ultrasonic processing machine, a strain gauge is attached to this, and a static strain meter is used. The expansion and contraction of the sample in the magnetic field was measured using the following method. The strain constant is generally defined as follows. Enter = Harm {(△
1/1)〃-(△1/1)↓}Enter here: Shigeru strain constant, (
△1 No)′′: Expansion and contraction ratio of the sample when the disk sample is magnetized in the direction in which the strain gauge is attached (that is, when a magnetic field is applied in this direction), (△1/1) ↓: Perpendicular to the strain gauge This is the expansion/contraction rate of the sample when it is magnetized in the direction. This amorphous metal material is obtained by the roll-stitching method, and because it requires rapid cooling from a liquid (molten) state, it is generally only possible to obtain a thin tape-like material (with a thickness of 50 mm or less). I can't do it. It is generally difficult to measure the strain on such thin samples, but as a result of investigating various methods of supporting the sample on the sample support stand, it has become possible to obtain reliable measured values. That is, for example, when a polycrystalline metal nickel disk sample of similar thickness was measured, a value almost equal to the previously reported measured value, ^31 34 x 10-6, was obtained. As a result of measuring the magnetostriction constant of a material in which a part of Fe, P or C of Fe8f, 3C7 was replaced with Cr using the above measurement method,
It was found that as the amount of Cr added increases, the input decreases monotonically as shown in Table 1 below. That is, for Cr-free Fe8oP, 3C7, input = 35×
10-6 was Fe72CGP, 3C7 ^
It decreased to SII×10-6. In Table 1 below, Tc: magnetic transition point (magnetic Curie point). g: Magnetization size per gram, Bs: Saturation magnetic flux density, Tcry:
is the crystallization temperature. Also, the density of Fe8 and 3C7 is 7.
It was measured as 38. It is thought that the density of a substance in which Fe is replaced with C does not change much, so in both cases the density is reduced to 7.
．． It was set at 38. Table-1 Generally, amorphous materials made by rapid cooling from a molten state are
Although the magnetic permeability is low as it is, it is known that the magnetic permeability increases by heat treatment in a magnetic field or heat treatment without a magnetic field. This is thought to be because the heat treatment gradually relieves the internal stress that remained in the rapidly cooled state. That is, this stress and magnetostriction combine with each other to produce induced magnetic anisotropy, and the magnitude of this stress is reduced by heat treatment, which increases magnetic permeability. Through such processing, Fe8J, as shown in Figures 1 to 3,
3C7, Fe76Cr2P, 3C7, Fe72Cr8P
, 3C7, the effective magnetic permeability e (IK ratio) is 280, 350, and 800, respectively, before heat treatment, but it is 4000 5
000 and 10000, respectively. However, in actual magnetic heads, several thin plate-shaped head chips are stacked and molded with resin to form a molded product. On this occasion,
It is unavoidable that tension is applied to the head chip due to shrinkage as the resin hardens, and this tensile stress interacts with magnetostriction again to produce a new induced magnetic anisotropy, which causes a decrease in magnetic permeability. induce. Therefore, from the perspective of a head material,
A material with a small magnetostriction constant is desired, and it can be seen that Cr atoms have a remarkable effect of reducing the magnetostriction constant, as shown in Table 1 above. Figures 1 to 3 show this effect in terms of changes in magnetic permeability after molding.
Figure 1 shows an outer diameter of 7 mm obtained from a tape-shaped sample of an amorphous material with an atomic composition of P, 3C7 and Fe spots that do not contain Cr. , put a glue-like sample with an inner diameter of 4 skins and a thickness of about 40 mm into a pyroferrite ring storage container, and place it in a pyroferrite ring storage container.
, frequency characteristics of magnetic permeability after annealing in a hydrogen stream for 1 hour (hereinafter referred to as A-f characteristics) and resin molds (epoxy resins with trade names of Bellnox ME-105 and Bellcure HY-3).
09 in a ratio of 100:32 and cured for 40 qo x 1 hour, and further for 70 qo x 5 hours). According to this result, it can be seen that especially the re of the low frequency castle is drastically reduced to 550 after molding.
Figures 2 and 3 show Fe78Cr2P,3 containing Cr.
Regarding the same ring-shaped sample as above of the amorphous material with the composition of C7 and Fe72Cr8P, 3C7, 380
The mu f characteristics before and after molding with the same resin as above are shown, respectively, after being annealed in a steam flow for 0 and 1 hour at 36 years old. In general, since amorphous materials are non-crystalline, they do not exhibit magnetocrystalline anisotropy, and therefore have low frequency characteristics. ☆ (0: column and magnitude of external stress). From the results shown in Figures 1 to 3, the magnetic permeability decreases due to the stress caused by the resin mold, but the values at low frequency castles are as shown in Table 1 above.
It can be seen that it is almost inversely proportional to the magnetostriction constant shown in . This means that F
In amorphous metal materials mainly composed of e, P, C
Also, it clearly shows that when part of Fe is replaced with Cr atoms, the magnetostriction constant decreases. In the above example, the composition of the amorphous forming elements is P, 3C7, but the decrease in the magnetostriction constant due to the addition of Cr is similar to that of other amorphous materials with various relative ratios of Fe, Cr, PLC. Of course, this is also expected. Further, the amount of Cr added can be varied within the range of 2 to 12 t%, but it will be understood that the larger the amount, the more the magnetostriction constant decreases. The above-mentioned amorphous material made by adding Cr to the Fe-P-C system has a low magnetostriction constant, excellent processability and resin molding resistance, and a relatively high magnetic flux density. The magnetic Curie point is relatively low, and there is still room for improvement in terms of magnetic flux density. Example Instead of the Fe-Cr-P-C system according to Comparative Examples 2 to 6 described above, in this example, Fe,oo-X-ZCrZ(Si,-
An amorphous material having a composition of yBy)X was used. In this case, X=10-27 (preferably 15-25),
Y=0.25-0.95, Z=2-15. That is,
The amount of Cr is 2 to 1&t%, the amorphous element is changed from the P-C system to the Si-B system, and the amount added is 10 to 27 at%, and Si:B = 5 to 75:25 to 95. This is different from Comparative Examples 2 to 6 described above. Next, various properties of the amorphous material according to this example will be explained. When measuring the magnetostriction constant, we used a tape-shaped amorphous material with the above composition on the surface of a mountain surface with a thickness of 40 to 50 cm, inside and outside the width IQ, synthesized by the double roll method. After polishing, a 5-diameter willow disk was punched out using an ultrasonic processing machine, a strain gauge was attached to it, and the expansion and contraction of the sample in a magnetic field was measured using a static strain meter. By this measurement method, Fe78.,-zCrzSi5.
The results of measuring the magnetostriction constants of amorphous materials having compositions of 9B, 6 and FewzCrzSi, oB in a magnetic field of about 11 KOe are shown in Table 2 below, together with comparative examples. According to this result, in an amorphous material containing Si and B as amorphous forming elements, with the remainder being Fe,
When Cr is not added, the content is 35×10-6, but Cr
With addition, ^ decreased rapidly, and Cr decreased to pine t% (z = 8)
It can be seen that it decreases to ^311×10-6. However, it was found that the crystallization temperature Tcry increased, and the magnetic Curie point Tc and spontaneous magnetization also increased. Although g decreases, the above-mentioned F
Tcry, Tc, because the reduction rate is smaller and the absolute value is larger than that of the e-Cr-P-C system. It can be seen that g has improved. Table 12 Measurement of magnetic permeability is essential for evaluation as a magnetic head material, and it is desirable that the value be large. For this purpose, similarly to Comparative Examples 1 to 6 above, a ring-shaped sample (outer diameter 5 side, inner diameter 2 side ◇) is chemically or mechanically punched out from a surface-polished amorphous material tape. Sakumaki insulation was laminated and used for magnetic permeability measurement. There are three types of conditions for the measurement sample: Namely, ``'1), A state in which the sample surface made by rapid cooling is polished and cut out into a ring shape.■, A state in which it is annealed for 1 hour in a hydrogen stream at an appropriate temperature before crystallization.'3 }, the sample from ■ above is molded in resin (same as described above).The reason for looking at the effect of resin molding is, as mentioned above, one of the reasons is how many thin head chips are used in the actual head. The second reason is that the magnetic permeability-frequency characteristic (Mu f characteristic) after resin molding corresponds to the actual head performance, and the second reason is that the magnetostriction constant is reduced. This is because the stress caused by the resin mold combines with magnetostriction to produce magnetoelastically induced magnetic anisotropy, but in general, the larger this anisotropy is (the more the resin mold It is expected that the magnetic permeability will decrease especially at low frequencies (assuming that the stress caused by the magnetic flux is constant) and the magnetic permeability decreases as the input becomes larger. Figures 4 to 6 show the -f characteristics measured under the above conditions. In these figures, Fe76., Cr2Si5.9
86, Fe74. , Cr4Si5.9B,6F
e7o. , Cr8Si5.9B6, the adhesive-f characteristics under various conditions are shown, respectively.
Generally, it is known that the magnetic permeability of an amorphous material increases in both the real and imaginary parts when hammered at a specific temperature below the crystallization temperature, and this tendency is evident in this example as well. In addition, the magnetic permeability tends to deteriorate due to the occurrence of induced magnetic anisotropy caused by the resin mold, but according to Figures 4 to 6, the amorphous forming elemental forces are $j and B, and the remainder is F
By increasing the amount of Cr added to the amorphous material e.g., the degree of deterioration can be suppressed to a significantly low level.
For example, Fe76. , Cr2Si5. Queen, 6 is mu e (
IKHz) decreased to 3600, but Fe70. , Cr8Si axis B, 6, Buddha e(I
It is possible to suppress the degree of deterioration of 1,600 KHz) and maintain a large absolute value. The fact that the deterioration of Buddha e is small in this way corresponds to the decrease in the magnetostriction constant shown in Table 2 above. Thus, Fe78. ,-zCrzSi
In the 5.9B6 amorphous material, it was confirmed that as the amount of Cr added increases, the strain constant decreases compared to the case without Cr. However, as shown in Table 2 above, Fe78-zCr
The same phenomenon as described above is also observed in materials in which the relative composition ratio of Si and B is changed, such as the zSi, oB, 2 system. Therefore, the decrease in the magnetostriction constant due to the addition of Cr atoms is generally applicable to materials in which the amorphous state represented by -x(Si,-Y&)x is realizable and also has arbitrary x and Y values. This can also be easily expected for amorphous materials whose composition system has a part of Fe replaced by ferromagnetic red transition metals such as Co and Nj, and whose magnetostriction constant is mainly due to Fe. . Table 3 below shows the effect of adding Cr to an amorphous material in which a portion of Fe is replaced with Co or Ni, but the addition of Cr still results in a decrease in the magnetostriction constant and an increase in the crystallization temperature Tc. It can be seen that the characteristics are improved. Table 3 Amorphous forming elements Si and B in the alloy according to this example
The effect of
It can be seen that it is also largely retained. In addition, the magnetostriction constant of an amorphous material whose amorphous forming elements are P, B, and C and the remainder is Fe is ^ 35 × 1
0-6, which is almost the same as that of Comparative Example 7, so it can be assumed that the amorphous-forming elements of the alloy according to this example are not only the above-mentioned Si and B, but also
It will be appreciated that it may also consist of P, B and Si. Although the magnetostriction of the amorphous material in this case is mainly caused by Fe, it is easily presumed that the addition of Cr has the effect of reducing the strain constant. In other words, even if other elements such as P are included in addition to Si and B as amorphous forming elements, Fe in the amorphous exhibits almost the same strain, and therefore the effect of Cn addition on it will be almost the same. It is. Next, each example shown in Tables 2 and 3 will be explained in more detail. Comparative Example 7 In order for Fe and B to be friends in atomic percent, (
Fe3Bi) was weighed in advance and melted in a high frequency melting furnace to form an alloy. This was crushed into small pieces, and Fe78. , Si5.9B
, 6, and melted them in a high-frequency melting furnace.Next, this was crushed into small pieces and melted in a plasma melting furnace to obtain a small spherical hammer.Next Several of these hammers are welded into an alumina tube with a nozzle set in a preheated electric furnace, held at a temperature slightly higher than the melting point for 2 to 3 minutes, and then the molten material is squirted out using gas pressure. By the double roll method, an amorphous tape-like sample with a width of 1 inch inside and outside, a thickness of 40 to 50 mm, and a length of 1 inch or more was obtained.The amorphous property was confirmed using X.
It was performed using a line diffractometer. After taking a part of this tape-shaped sample and polishing the surface, a disk-shaped sample and a ring-shaped sample were obtained by photoresist method and electrolytic etching method (each size was 5 squares and 5 bars in outer diameter). × inner diameter 2 skin)
. {a} A strain gauge was attached to the disk-shaped sample using Aron Alpha as an adhesive, and the expansion and contraction of the sample in a magnetic field at room temperature was measured using a static strain meter, and the value of the magnetostriction constant as shown in Table 1-2 was obtained. The ring-shaped sample was stored in a pyroferrite storage container insulated and stacked, and subjected to the measurement of the initial magnetic permeability. After desensitizing with lhr phosphorus and measuring the initial magnetic permeability in the same way, the ring-shaped sample was molded with epoxy resin into the above-mentioned pyroferrite ring storage container, and the frequency characteristics of the initial magnetic permeability were measured again.'c } The magnetic Curie point and the magnitude of magnetization at room temperature were determined using a magnetic balance using high-purity Ni sinter as a standard sample. The obtained results are shown in Table 2 above. (d} The crystallization temperature is It was determined using a DTA device.The results are shown in the table above.
Shown in 2. The hardness (Vickers hardness) when a 200 gr load was applied to the 'c' Vickers indenter for 19 seconds was measured, and the results are shown in Table 2 above. 'f) The specific resistance at room temperature was determined using a Wheatstone bridge, and the results are shown in Table 2 above. Example 1 Fe76. , Cr2Sj5.9B,6, in addition to the raw materials shown in Comparative Example 7, metal Cr was weighed to have the above composition in atomic %, and then the same shape was prepared by the method shown in Comparative Example 7. It was obtained as a tape-shaped amorphous material. After taking a part of this and polishing the surface, a disk-shaped sample and a ring-shaped sample were extracted by the same method as described in Comparative Example 7, and further similar measurements were carried out for [a}, leg, 'c}, and [d}. , [d,
As a result, the measured values shown in Table 2 and the frequency characteristics of the initial magnetic permeability shown in Fig. 4 were obtained. In addition to the raw materials shown in Comparative Example 7, the materials were weighed to have the above composition, and then prepared in the same manner as described in Comparative Example 7 to form a long piece with a width of 1 rib and a thickness of 40 to 50 r. Roughly 2
Obtained as a skin tape sample. After taking a part of this and polishing the surface, a disk-shaped sample on the 5th side, a ring-shaped sample with an outer diameter of 5 skin) and a ring-shaped sample with an inner diameter of 2 skin were punched out using an ultrasonic processing machine. }, 'b} and the frequency dependence of the magnetostriction constant and initial permeability were measured using the method of the same machine, and the results shown in Table 2 and Figure 5 were obtained. Using the same method as for cl, 'd}, 'e}, {f, the magnetic properties, crystallization temperature, etc. listed in Table 2 above were obtained.Example 3 Fe72., Cr6Si5.9B, 6 The amorphous material was prepared by weighing metal Cr in addition to the raw materials shown in Comparative Example 7 to have the above composition, and using the same method as described in Comparative Example 7, the width was 1 mm inside and outside, and the thickness was 40 to 50 mm. , was obtained as a tape-shaped sample with a length of about 2 skins.Next, a part of this was taken and the surface polished, and then a material of the same shape and size as described in Example 2 was punched out using an ultrasonic processing machine for comparison. Magnetostriction and initial magnetic permeability were measured by the methods described in 'a} and {b) in Example 7.As shown in Table 2 above, a value of ^314xlo-6 was obtained.In addition, in the same example, [c}
, ■, 'e', {f Various properties (Table 2 above) were measured according to the method. Example 4 Fe7o. , Cr8Si Ship B6 was prepared by weighing the raw materials described in Comparative Example 7 as well as metal Cr to have the above composition, and using the same procedure as described in Comparative Example 1 to obtain A tape-shaped sample with a length of 40 to 50 r skin L approximately 2 mm was obtained.Next, a part of this was surface-polished, and disk-shaped and ring-shaped samples were obtained by the method described in Examples 2 and 3 for comparison. {a in example 7
) When the magnetostriction was measured using the method described in
I got 6. This value is based on Fe78. , Si5.3
, 6 (Comparative Example 7) is approximately 30% of 335×10-6. Further, the initial magnetic permeability-frequency characteristics obtained by the method described in [b} in Comparative Example 7 showed the results shown in FIG.
That is, the effective initial magnetic permeability at IKHz was 2400 as it was punched after surface polishing. Next, this was desensitized in hydrogen for 403 pm, 1 hr.
It increased to 6000. Finally, when I molded this in resin, it cost 1,600 yen. It has been found that such a 〆-f characteristic is good as a magnetic head characteristic. Comparative Example 8 Fe78Si, oB is prepared by making Fe725 using the procedure described in Comparative Example 7, and weighing it, Fe, and Si.
8 was melted in a high frequency melting furnace. Next, a small piece of this material was melted in a plasma furnace as shown in Comparative Example 7, and a double roll method was used to melt the material to a width of 1 inch and a thickness of 40 to 40 mm.
A tape-shaped product with 50 ridges and approximately 2 lenghts in length was obtained. This material was found to be amorphous by X-ray diffraction. Next, after surface-polishing a part of this, the method shown in Comparative Example 7 was used to obtain disk-shaped and ring-shaped samples. These disk samples and ring samples were 'a' and 'a' in Comparative Example 7.
The tensile strain and initial permeability of each specimen were measured using the method described by Suko. In addition, some of the others are 'c--[f] in the same comparative example.
The magnetic properties, crystallization temperature, etc. were measured using the method shown in . The results are shown in Table 2 above. The magnetostriction constant is 38×10-6, and the material of Comparative Example 7 is Fe78. ，
Si5. It was almost the same value as Princess 6. Example 5 Part of Fe in the material in Comparative Example 8 was replaced with Cr. An amorphous material having a composition of Fe76Cr2ST, oB, 2 is obtained by weighing Fe7585, Fe, and Sj to have the above composition, preparing a raw material by the same method as described in Comparative Example 7, and molding it into the desired tape shape by the same method. The product was obtained.
Furthermore, disk-shaped and ring-shaped samples were extracted using the same method, and magnetostriction and initial permeability were measured using the methods described in 'a} and {b) in the same comparative example, respectively. Also, 'c-~ in the same comparative example
According to the method of [f-], the results shown in Table 2 above were obtained. Comparative Example Fe3B, Fe, Sj, and Co were weighed so as to have a composition of 6 phantom e-1 and o-1 taka i-1 at 9 atomic %, and by the method described in Comparative Example 7, raw materials for an amorphous material were prepared. And a tape-shaped amorphous material was obtained. Further, by the method described in the same comparative example, a disk-shaped sample and a ring-shaped sample were extracted, and the strain and initial permeability were measured.
The magnetostriction data and the results obtained by the method in the same comparative example are shown in Table 2 above. Example: 5 buildings e at 6 atom%
An amorphous tape having a composition of -1 $o- and r-1 eaves i-1 was prepared by the method shown in Comparative Example 7, and the methods 'a), {b], and 'c} described in the same comparative example were used. , {of, 'e
), {f were used to measure various properties, and the results shown in Table 2 above were obtained. As will be known from this, Cr has the effect of reducing ^, as in the above embodiment. Comparative Example 10 An amorphous tape having a composition that satisfies 6 groups e-1 rule i-1 $i-1 in atomic % was prepared by the method shown in Comparative Example 7, and the methods {a}, { b}, [c'"'
When the various properties of 'e} and 'Kawa were investigated, the results listed in Table 2 above were obtained. Example 7 An amorphous tape having a composition of 5 atomic % e-1 law i-4Cr-100 million i-1 waves was prepared by the method shown in Comparative Example 7. a}, [b
}, 'c', 'd', [d,' When various properties were investigated from the river, the results listed in Table 2 above were obtained. As is known from this, the addition of Cr significantly reduces the magnetostriction constant. Comparative Example 11 An amorphous tape having a composition of 8 Misaki e-1 Misaki 1 Ship in atomic % was prepared by the method described in Comparative Example 7 using Fe3B, Fe3P, and Fe as raw materials. Method 'illusion, (d, 'c} '{d', 'e}, 'f}
When the various properties were measured, the results shown in Table 2 above were obtained. Regarding the strain constant, as is known from the results of Comparative Examples 7 and 8 summarized in Table 12 above and Comparative Example 11 (Table 3 above), amorphous materials containing only Fe as a metal element are non-crystalline. Regardless of the type of quality-forming element (glass atom),
It was found that the value is approximately constant at 30 to 35 x 10-6. Comparative Example 12 An amorphous tape having a composition of 7 groups e-4Cr-1 and 1 female in atomic % was mixed with Fe3B, Fe3P, Fe, Cr.
was prepared by the method described in Comparative Example 7 using as raw material, and the method (a}, 'b}, 'c}, leg,
When various properties were measured from [d to {f''], the results shown in Table 1-2 above were obtained.

[Brief explanation of drawings]

The drawings are for explaining the amorphous material according to the present invention, and FIG. 1 is a graph showing the frequency dependence of effective magnetic permeability before and after resin molding of a dulled amorphous material according to a comparative example, and FIG. A graph showing the frequency dependence of the effective permeability before and after resin molding of a dulled amorphous material according to another comparative example, and FIG. Graphs showing frequency dependence of magnetic property, Figures 4 to 6
The figure shows an uncompetitive amorphous material according to an embodiment of the present invention;
2 is a graph showing the frequency dependence of effective magnetic permeability before and after resin molding of a blunted amorphous material. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1 (a) 2 to 15 at% Cr; (b) Si and B in a total amount of 10 to 27 at% (however,
Atomic ratio Si:B=75-5:25-95), (c)
An amorphous magnetic alloy consisting of the remainder being Fe. 2 (a) 2 to 15 at% Cr; (b) total amount of 10 to 27 at% Si and B (however,
Atomic ratio Si:B=75-5:25-95), (c)
a balance consisting of Fe and at least one of Co and Ni, and the amount of Fe is 50at of the entire remainder.
% or more, and the total amount of Co and Ni is 50 at % or less of the entire balance.