CN106950518B - Ferromagnetic resonance testing device and method - Google Patents
Ferromagnetic resonance testing device and method Download PDFInfo
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- CN106950518B CN106950518B CN201710133024.8A CN201710133024A CN106950518B CN 106950518 B CN106950518 B CN 106950518B CN 201710133024 A CN201710133024 A CN 201710133024A CN 106950518 B CN106950518 B CN 106950518B
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Abstract
The invention discloses a ferromagnetic resonance testing device and a ferromagnetic resonance testing method. Wherein, this test device of ferromagnetic resonance includes: base and set up in the sample loading subassembly on the base, wherein, the sample loading subassembly includes: the device comprises a translation assembly, a first rotating assembly and a sample platform for bearing a sample to be tested; the first rotating assembly is connected with the sample platform and drives the sample platform to rotate in any angle of a first plane where the sample platform is located; the translation assembly is connected with the sample platform and used for moving the sample platform to separate the sample to be tested and the planar waveguide.
Description
Technical Field
The invention relates to the field of ferromagnetic resonance measurement, in particular to a ferromagnetic resonance testing device and method.
Background
At present, the following test schemes are mainly used for ferromagnetic resonance: resonant cavity ferromagnetic resonance technology, broadband ferromagnetic resonance technology, and angle-resolved ferromagnetic resonance technology. In the test, the orientation of the sample relative to the fixed magnetic field is an extremely important experimental parameter, and the orientation-adjustable ferromagnetic resonance technology is called an angle-resolved ferromagnetic resonance system. When the magnetic field is fixed, the adjustability of the orientation of the sample is the key to the angle-resolved ferromagnetic resonance technique.
However, existing ferroresonance measurements have certain dead zones, such as: because the sample to be tested and the planar waveguide must be in close contact during testing, and the microwave cable and the planar waveguide system cannot be bent, deformed and vibrated at any angle in the testing process, the existing testing scheme is difficult to realize the testing at any angle, and the angle resolution ferromagnetic resonance is not true. For example, as shown in fig. 1a and 1b, the existing angle-resolved test scheme can only perform in-plane rotation or out-of-plane rotation, so that due to the space limitation, the joint operation of two dimensions cannot be realized, and thus a significant test blind area exists.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a ferromagnetic resonance testing device and method, which at least solve the technical problem that a test blind zone exists in a ferromagnetic resonance test in the related technology.
According to an aspect of an embodiment of the present invention, there is provided a ferromagnetic resonance testing apparatus, including: base and set up in the sample loading subassembly on the base, wherein, the sample loading subassembly includes: the device comprises a translation assembly, a first rotating assembly and a sample platform for bearing a sample to be tested; the first rotating assembly is connected with the sample platform and drives the sample platform to rotate in any angle of a first plane where the sample platform is located; the translation assembly is connected with the sample platform and used for moving the sample platform to separate the sample to be tested and the planar waveguide.
Optionally, the testing apparatus further comprises: and the second rotating assembly is arranged on the base and is used for rotating along any angle in a second plane where the second rotating assembly is located so as to drive the sample loading assembly to rotate.
According to another aspect of the embodiments of the present invention, there is also provided a method for testing ferromagnetic resonance, including: in the process of testing a sample to be tested, the sample to be tested is separated from the planar waveguide, the sample to be tested is rotated to any angle in the plane where the sample to be tested is located, and then the sample to be tested is loaded to the planar waveguide.
Optionally, when the sample to be tested is rotated in the plane where the sample to be tested is located, the method further comprises: and rotating the sample to be detected in a plane vertical to the plane of the sample.
In the embodiment of the invention, a technical means that a translation component, a first rotating component and a sample platform for bearing a sample to be tested are arranged in a sample loading component of a testing device is adopted, because the first rotating component can drive the sample platform to rotate in any angle of a first plane where the sample platform is located, and the translation component can move the sample platform to separate the sample to be tested and a planar waveguide, the separation of the sample to be tested and the planar waveguide in the testing process can be realized, so that the technical effect of no testing blind area is realized, and the technical problem of testing blind area in the ferromagnetic resonance testing in the related technology is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1a is a schematic illustration of in-plane rotation of a sample under test while performing a ferromagnetic test, according to the related art;
FIG. 1b is a schematic illustration of an out-of-plane rotation of a sample under test while performing a ferromagnetic test, according to the related art;
FIG. 2 is a schematic diagram of a ferromagnetic resonance testing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another ferroresonance testing apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an alternative ferroresonance testing apparatus in accordance with an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an alternative ferroresonance testing apparatus carrying a sample to be tested according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating an alternative measurement principle of a ferromagnetic resonance testing apparatus according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for testing ferromagnetic resonance according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In the related art, the measurement scheme of ferroresonance is mainly limited in that the sample and the planar waveguide must be in close contact during the test. Microwave cables and planar waveguide systems are not able to be tested for any bending, deformation and vibration. Therefore, the existing angle resolution test is difficult to realize the test of any angle and is not the angle resolution ferromagnetic resonance in the true sense. Related limitations are that the driving force changes along with the angle, the magnetic field space is located between narrow gaps of magnetic poles, and one dimension of the inflexible high-frequency cable inevitably collides with a magnet in the rotating process
In view of the above, it is an object of the present embodiment to provide a simple and reliable method and design. The separation of the sample and the planar waveguide and the arbitrary angle rotation of the sample are realized on the test rod by a translation assembly and a first rotation assembly in the sample loading assembly. By integrating the translation component, the rotation component (equivalent to the second rotation component hereinafter), the planar waveguide, the high-frequency microwave cable, the magnetic field system, the rotation component (i.e. the first rotation component hereinafter) and the translation component, the ferromagnetic resonance test of any angle can be realized. The following detailed description is given with reference to specific examples.
Fig. 2 is a schematic structural diagram of a ferroresonance testing apparatus according to an embodiment of the present invention. As shown in fig. 2, the test apparatus includes: a base 2 and a sample loading assembly 20 disposed on the base, wherein the sample loading assembly 20 comprises: the device comprises a translation assembly 201, a first rotating assembly 203 and a sample platform 205 for bearing a sample to be tested;
the first rotating component 203 is connected to the sample platform 205 and drives the sample platform 205 to rotate within any angle (i.e. perform in-plane rotation) of the first plane where the sample platform 205 is located, although the multi-angle test can be realized by adopting such a structure, because the sample platform and the planar waveguide are in close contact and there is a certain test blind area when the sample platform and the planar waveguide are in close contact, the translating component 201 is connected to the sample platform 205 and is used for moving the sample platform 205 to separate the sample to be tested from the planar waveguide. By adopting the structure, the separation of the sample to be measured and the planar waveguide can be realized.
Optionally, as shown in fig. 3, the testing apparatus further includes: a second rotating assembly 22 disposed on the base 2 for rotating along any angle in a second plane where the second rotating assembly 22 is located so as to drive the sample loading assembly 20 to rotate. In this way, in conjunction with the structure shown in fig. 2, with the cooperation of the first rotating assembly 203, the second rotating assembly 22 and the translating assembly 201, the apparatus for testing ferromagnetic resonance provided in this embodiment can achieve measurement of ferromagnetic resonance at any angle in a magnetic field, and can further reduce or even eliminate measurement blind areas.
Optionally, the first plane and the second plane are perpendicular. In an alternative embodiment, as shown in fig. 3, the above-mentioned translation assembly 201 comprises: a translation stage 2011 for implementing position translation and a first connecting rod 2013 connected with the translation stage 2011; the first rotating assembly 203 and the sample platform 205 are both disposed on the first connecting rod 2013 and connected by the first connecting rod 2013. Thus, the design of a single test rod is realized
Optionally, the plane of the translation stage 2011 is perpendicular to the plane of the first connecting rod 2013.
The connection between the first rotating assembly and the sample platform 205 can be implemented in various manners, for example, by using a transmission device, which can include a motor, and the motor drives the sample platform 205 to rotate through a transmission rod, and in an alternative embodiment, as shown in fig. 3, the testing device can further include: a power transmission belt 24 disposed between the first rotating member 203 and the sample stage 205; the first rotating assembly 203 drives the sample platform 205 to rotate via the power transmission belt. It should be noted that the first rotating assembly 203 may include, but is not limited to, a motor.
Alternatively, as shown in fig. 3, the sample loading unit 20 and the second rotating unit 22 may be disposed on opposite surfaces of the base 2.
Optionally, as shown in fig. 3, the testing apparatus further includes: a second connecting rod 26 has one end connected to the base 2 and the other end provided with a planar waveguide 28. It should be noted that a microwave connector may be further disposed at one end where the planar waveguide is disposed.
To facilitate an understanding of the above embodiments, a detailed description is given below in conjunction with a specific embodiment.
Fig. 4 is a schematic structural diagram of an alternative ferroresonance measuring device according to an embodiment of the present invention, as shown in fig. 4, the measuring device includes:
Fig. 5 is a schematic structural diagram of an alternative ferroresonance testing apparatus carrying a sample to be tested according to an embodiment of the present invention. As shown in fig. 5, the test apparatus includes: rotary stage 22, translation stage 2011, rotary stage 203, planar waveguide and microwave junction 28, sample loading and rotation system 205, structural mount 2 (equivalent to base 2), connecting rod 26, power transmission belt 24. Where 205 and 208 are located in the strong magnetic field region 52 and 50 represents a high frequency cable.
A sample rod is added between the electromagnetic poles, and the orientation of the sample is controlled through a rotating platform and a translation platform, so that the angle-dependent ferromagnetic resonance test is realized.
Based on the above structure, the principle of the present embodiment is explained: the rotation of the sample in any orientation is realized through a single sample rod, two rotating tables, a translation table, a standard planar waveguide and a special sample loading system. The design of the angle-resolved ferromagnetic resonance test rod can separate the planar waveguide and the magnetic film in situ during the test process, and independently rotate the film sample so as to fix the direction of the bias magnetic field and the direction of the microwave magnetic field. In this case, the ferromagnetic resonance signal is not affected by the magnetization direction of the sample, and there is no test blind area and no signal period variation. Fig. 6 is a schematic diagram illustrating a measurement principle of an alternative ferroresonance testing apparatus according to an embodiment of the present invention. As shown in fig. 6, one measurement principle of the present embodiment is as follows:
in the following processing steps, any rotation is decomposed into an in-plane rotation around the sample plane (phi degrees of freedom in an in-plane or spherical coordinate system) and a rotation from the sample plane to the perpendicular sample surface (theta degrees of freedom in an out-of-plane or spherical coordinate system).
1) The separation of the sample and the planar waveguide, the in-plane rotation of the sample, the reloading of the sample and the out-of-plane rotation of the sample can be realized according to the sequence of a → b → c → d → e, thereby realizing the whole process of arbitrary sample magnetization direction, namely, the orientation of the external magnetic field Hdc along an arbitrary film coordinate system. It can be equivalently implemented in the order of a → f → b → c → d. Namely, the rotation in the plane is firstly carried out and then the rotation out of the plane is carried out or the rotation out of the plane is carried out and then the rotation in the plane is carried out.
2) The separation of the sample and the planar waveguide, the in-plane rotation of the sample, the reloading of the sample and the out-of-plane rotation of the sample can be realized according to the sequence of a → b → c → d, so that the arbitrary in-plane magnetization direction of the sample, namely the external magnetic field Hdc, is oriented along the arbitrary in-plane thin film.
3) Rotation of the sample from in-plane to out-of-plane can be achieved in the order of a → f, thereby achieving arbitrary sample out-of-plane magnetization direction, i.e., external magnetic field Hdc, oriented along arbitrary thin film out-of-plane to in-plane. The planar waveguide and the sample may not be separated during this process.
Based on the embodiment of the application, ferromagnetic resonance measurement of a magnetic field at any angle can be realized, and angle-resolved ferromagnetic resonance in a real sense is realized. In the test process, the bias magnetic field is ensured to be vertical to the microwave magnetic field, the ferromagnetic resonance signal strength is not influenced by the rotation angle theoretically, and the in-plane rotation angle test blind zone is removed. The design of single test rod saves space, convenient integration. The electronics involved in rotating the assembly (e.g., the motor) are all far from the magnetic field, avoiding magnetic components from interfering with the measurement. The measurement is full-automatic, and manual intervention is not needed.
Example 2
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method of ferromagnetic resonance testing, it being noted that the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 7 is a test method of ferromagnetic resonance according to an embodiment of the present invention, as shown in fig. 7, the method including the steps of:
step S702, separating the sample to be tested from the planar waveguide in the process of testing the sample to be tested. In an optional embodiment, in order to further reduce or eliminate the blind area, when the sample to be measured is rotated in the plane of the sample to be measured, the sample to be measured may also be rotated in a direction perpendicular to the plane of the sample.
Step S704, rotating the sample to be tested to any angle in the plane where the sample to be tested is located, and then loading the sample to be tested to the planar waveguide.
It should be noted that the above steps S702 to S704 can be implemented by the test apparatus in embodiment 1, for example, by a control system in the test apparatus.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A ferroresonance testing apparatus, comprising: a base and a sample loading assembly disposed on the base, wherein,
the sample loading assembly, comprising: the device comprises a translation assembly, a first rotating assembly and a sample platform for bearing a sample to be tested;
the first rotating assembly is connected with the sample platform and drives the sample platform to rotate in any angle of a first plane where the sample platform is located; the translation assembly is connected with the sample platform and used for moving the sample platform to separate the sample to be detected and the planar waveguide;
wherein, the testing device further comprises: the second rotating assembly is arranged on the base and used for rotating along any angle in a second plane where the second rotating assembly is located so as to drive the sample loading assembly to rotate;
wherein the first plane and the second plane are perpendicular;
wherein, the testing device further comprises: and one end of the second connecting rod is connected with the base, and the other end of the second connecting rod is provided with the planar waveguide.
2. The testing device of claim 1, wherein the translation assembly comprises: the device comprises a translation table for realizing position translation and a first connecting rod connected with the translation table; the first rotating assembly and the sample platform are both arranged on the first connecting rod and are connected through the first connecting rod.
3. The test device of claim 2, wherein the plane of the translation stage is perpendicular to the plane of the first connecting rod.
4. The testing device of claim 1, further comprising: the power transmission belt is arranged between the first rotating assembly and the sample platform; the first rotating assembly drives the sample platform to rotate through the power transmission belt.
5. The testing device of claim 1, wherein the sample loading assembly and the second rotation assembly are disposed on opposite sides of the base, respectively.
6. A ferroresonance testing method, characterized in that the following testing steps are performed using the ferroresonance testing apparatus of any one of claims 1 to 5:
in the process of testing a sample to be tested, separating the sample to be tested from a planar waveguide, rotating the sample to be tested to any angle in a plane where the sample to be tested is located, and then loading the sample to be tested to the planar waveguide;
wherein, when the sample to be detected is rotated in the plane where the sample to be detected is located, the method further comprises the following steps: and rotating the sample to be detected in a plane vertical to the plane of the sample.
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| CN104237813A (en) * | 2013-06-21 | 2014-12-24 | 电子科技大学 | Novel method for testing ferromagnetic resonance line width of microwave ferrite material |
| CN204439814U (en) * | 2014-09-16 | 2015-07-01 | 北京大华无线电仪器厂 | Microwave ferromagnetic resonance experimental system |
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| SU1190743A1 (en) * | 1984-05-21 | 1995-09-27 | В.И. Андреев | Device for measuring parameters of ferromagnetic resonance of ferrite spheres |
| DE19953190C2 (en) * | 1999-11-05 | 2002-11-07 | Bosch Gmbh Robert | Sensor arrangement for detecting an angle of rotation |
| CN100561249C (en) * | 2007-10-29 | 2009-11-18 | 北京航空航天大学 | A kind of giant magnetoresistance sensor characteristic detection device and method |
| CN203658565U (en) * | 2013-12-11 | 2014-06-18 | 广州赛宝计量检测中心服务有限公司 | Test fixture for measurement of ferromagnetic resonance parameters |
| CN203658564U (en) * | 2013-12-11 | 2014-06-18 | 广州赛宝计量检测中心服务有限公司 | Sample adjustment frame for measurement of ferromagnetic resonance parameters |
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| CN104237813A (en) * | 2013-06-21 | 2014-12-24 | 电子科技大学 | Novel method for testing ferromagnetic resonance line width of microwave ferrite material |
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