CN201210185Y - Magnetic domain observing device - Google Patents
Magnetic domain observing device Download PDFInfo
- Publication number
- CN201210185Y CN201210185Y CNU2008201197854U CN200820119785U CN201210185Y CN 201210185 Y CN201210185 Y CN 201210185Y CN U2008201197854 U CNU2008201197854 U CN U2008201197854U CN 200820119785 U CN200820119785 U CN 200820119785U CN 201210185 Y CN201210185 Y CN 201210185Y
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- magnetic head
- head
- large reluctance
- scanner
- magnetic
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The utility model relates to a magnetic domain observation device, which adopts the structure that an electric-control displacement platform is provided with a four-dimensional sample adjusting bracket that is used for holding the tested sample; an x-y-directional scanner is arranged in front of the four-dimensional sample adjusting bracket; the inner wall of a square through hole at the middle part of the x-y-directional scanner is provided with a z-directional scanner that moves along the z axis; the rear end of the z-directional scanner is provided with a magnetic-head clamp; the rear end of the magnetic-head clamp is provided with a magnetic-head suspension-bracket component of a vast magnetoresistive head; one side of the vast magnetoresistive head is provided with an optical microscope, a CCD camera and a monitor; the output terminal of the CCD camera is connected with the input terminal of the monitor; the other side of the vast magneticresistive head is provided with an iron fan; the readout signal end of the vast magneticresistive head is connected with a digital source list; the signal output terminal of the digital source list is connected with a computer. The device has the advantages that the cost is low, the device is uneasy to be damaged, and is free from being restricted by the size of the tested sample, and has strong universality.
Description
Technical field
The utility model relates to magnetic domain, particularly a kind of magnetic domain observation apparatus.
Background technology
Nano magnetic material is a kind of important nano material.Except Jie with nano material sees the characteristic, also have its special magnetic property, as quantum size effect, superparamagnetism, exchange coupling characteristic, magnetic anisotropy and magnetostrictive effect etc.These character make it have important in modern science and technology and use widely, thereby make nano magnetic material become one of hot fields of International Technology research.The domain structure and the characteristics of motion thereof have directly determined the physical property and the application direction of magnetic material, so the detection of the magnetic domain of nanoscale is the precondition of carrying out nano magnetic material research.
Magnetic domain on the observation magnetic material mainly realizes by magnetic force microscopy at present.The probe that is coated with thin magnetic film in the magnetic force microscopy can interact with the magnetic field that sample is produced, this makes the degree of crook and the resonant frequency of microprobe cantilever of magnetic force microscopy change, by analysis probe vibration position mutually or the change of frequency can draw information such as domain structure on the sample and distribution.This method requires lower to the preparation quality of sample and allows the magnetic field range that applies bigger, but also has following weak point:
1) costing an arm and a leg of magnetic force microscopy is more than 1,000,000 yuan;
2) size to sample has requirement, and diameter is below 15cm;
3) costliness (being generally more than 1000 yuan) is also fragile for the used needle point of magnetic force microscopy; And when the magnetic of sample and needle point material therefor does not match (needle point and sample stray field and anisotropy field separately need satisfy certain condition), can form magnetization between needle point and the sample and disturb, the domain structure distribution plan that obtains will and disturb the magnetization contrast that forms to be formed by stacking by the stray magnetic field contrast that characterizes normal domain structure.
Summary of the invention
The technical problems to be solved in the utility model is to overcome the deficiency of above-mentioned technology formerly, and a kind of magnetic domain observation apparatus is provided, and it is lower, not fragile that this device should have cost, is not subjected to the size restrictions of testing sample, the characteristics of highly versatile.
Basic design of the present utility model:
Principle that the resistance value that the utility model is based on large reluctance magnetic head changes with the variation of external magnetic field is carried out the observation of magnetic domain.After adding a constant electric current to large reluctance magnetic head, when the magnetic field in the external world changed, the resistance value of large reluctance magnetic head itself can change, thereby the voltage signal of the read output signal end of this large reluctance magnetic head also respective change can take place.Utilize the pseudo-colours method and large reluctance magnetic head is scanned a series of voltage datas that the testing sample surface time obtained and draw, can draw domain structure and distribution situation thereof on the sample by the software in the computing machine.
Technical solution of the present utility model is as follows:
A kind of magnetic domain observation apparatus, the characteristics of its formation are: be fixed with one for the four-dimensional sample adjustment rack of putting testing sample on automatically controlled displacement platform, just before be provided with xy to scanner at this four-dimension sample adjustment rack, on the square through hole inwall of this xy in the middle of the scanner, be provided with the z that moves along the z axle to scanner, at this z to the rear end of scanner fixed head anchor clamps, the head suspension assembly of large reluctance magnetic head fixedly is equipped with in the rear end of these magnetic head anchor clamps, side at this large reluctance magnetic head is an optical microscope, CCD camera and monitor, described optical microscope and CCD camera are combined slide block in back and the described head suspension assembly with optical axis and constitute imaging relations, described optical axis is vertical with the z axle, the input end of the described monitor of output termination of described CCD camera, the relative ion blower that is provided with of opposite side at described large reluctance magnetic head with described optical microscope, the read output signal end of described large reluctance magnetic head connects by described magnetic head anchor clamps and digital source epiphase, this digital source table provides a constant electric current to described large reluctance magnetic head on the one hand, gather the voltage signal of described large reluctance magnetic head read output signal end simultaneously, the signal output part of this digital source table links to each other with computing machine.
Described magnetic head anchor clamps are made by antistatic material.
The fixing four-dimensional specimen holder of testing sample is fixed on the automatically controlled displacement platform, drives four-dimensional specimen holder by automatically controlled displacement platform and move up, by automatically controlled displacement platform and four-dimensional specimen holder rough positioning device as testing sample at z;
Head suspension assembly is fixed on the magnetic head anchor clamps, drives large reluctance magnetic head to scanner and xy to scanner by z and upwards runs business into particular one to testing sample at z and approach, and the testing sample surface is upwards scanned at xy;
Utilize the contact situation between optical microscope, CCD camera and monitor real-time monitored large reluctance magnetic head and the testing sample;
With ion blower the influence of static to large reluctance magnetic head eliminated in large reluctance magnetic head blowing;
Described computing machine has mapping software, utilizes the pseudo-colours method and by the mapping software in the computing machine large reluctance magnetic head is scanned a series of voltage datas that the testing sample surface obtained and draw, and draws domain structure and distribution situation thereof on the sample.
The utility model has following advantage with respect to technology formerly:
1, cost is lower, below 500,000 yuan;
2, the head suspension assembly that large reluctance magnetic head is housed is commercial, cheap (general about two dollars); After utilizing ion blower to solve large reluctance magnetic head to be subject to the problem of electrostatic damage, generally can not be subjected to the influence of other problem and cause damaging; Do not exist and magnetic material between matching problem;
3, without limits to the size of sample;
4, for cooperating the selection in micron level zone to be scanned, be provided with four-dimensional specimen holder, as the rough positioning device of sample.
In a word, it is lower, not fragile that the utility model device has cost, is not subjected to the size restrictions of testing sample, highly versatile.
Description of drawings
Fig. 1 is the structural representation of the utility model magnetic domain observation apparatus embodiment
Fig. 2 is the structural representation of head suspension assembly 9 among Fig. 1
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
See also Fig. 1 earlier, Fig. 1 is the structural representation of the utility model magnetic domain observation apparatus embodiment.As seen from the figure, constituting of the utility model magnetic domain observation apparatus: on automatically controlled displacement platform 3, be fixed with one for the four-dimensional sample adjustment rack 2 of putting testing sample 1, just before be provided with xy to scanner 8 at this four-dimension sample adjustment rack 2, on the square through hole inwall in the middle of the scanner 8, be provided with the z that moves along the z axle to scanner 7 at this xy, at this z to the rear end of scanner 7 fixed head anchor clamps 10, the head suspension assembly 9 of large reluctance magnetic head 901 fixedly is equipped with in the rear end of these magnetic head anchor clamps 10, side at this large reluctance magnetic head 901 is an optical microscope 6, CCD camera 5 and monitor 4, described optical microscope 6 and CCD camera 5 are combined slide block 902 in back and the described head suspension assembly 9 with optical axis and constitute imaging relations, described optical axis is vertical with the z axle, the input end of the described monitor 4 of output termination of described CCD camera 5, opposite side and the described optical microscope 6 relative ion blowers 11 that are provided with at described large reluctance magnetic head 901, the read output signal end 903 of described large reluctance magnetic head 901 links to each other with digital source table 12 by described magnetic head anchor clamps 10, this digital source table 12 provides a constant electric current to described large reluctance magnetic head 901 on the one hand, gather the voltage signal of described large reluctance magnetic head 901 read output signal ends 903 simultaneously, the signal output part of this digital source table 12 links to each other with computing machine 13.
In the present embodiment, automatically controlled displacement platform 3 adopts the linear displacement platform of the M-405.DG type of PI company, but its unidirectional repeatable accuracy is 200 nanometers; Four-dimensional sample adjustment rack 2 is fixed on the automatically controlled displacement platform 3, as the rough positioning device of sample, and the inclination of scalable testing sample 1, the elevation angle and the motion on the xy direction thereof; Testing sample 1 is fixed on the four-dimensional sample adjustment rack 2; Xy adopts the P-734.2C1 molded lines pzt platform actuator of PI company to scanner 8, sweep limit 0.1mm*0.1mm, and there is the 5cm*5cm through hole centre, non-loaded resonant frequency 500Hz; Z adopts the P-753.11C type device of PI company to scanner 7, and collapsing length is 0.012mm, is fixed on xy on the square through hole inwall of scanner 8; The anchor clamps 10 of large reluctance magnetic head are fixed on z on scanner 7; The head suspension assembly 9 that large reluctance magnetic head 901 is housed is fixed on the magnetic head anchor clamps 10; CCD camera 5 and optical microscope 6 are combined, and the output signal of CCD camera 5 is supplied with monitor 4, and these three devices are fixed on the side of large reluctance magnetic head 901, perpendicular to z to; Slide block 902 in the head suspension assembly 9 equals the operating distance of optical microscope 6 to the distance of the minute surface of optical microscope 6, and slide block 902 and optical microscope 6 in the head suspension assembly 9 are coaxial; Ion blower 11 is positioned at another side of large reluctance magnetic head 901, and is opposed with the minute surface of optical microscope 6, and ion blower 11 is about 50 centimetres to the distance of large reluctance magnetic head 901; Digital source table 12 adopts the 2601 type figure sources table of U.S. Keithley company, and it links to each other with the read output signal end 903 of large reluctance magnetic head 901 and link to each other with computing machine 13 by the GPIB card by magnetic head anchor clamps 10.
The utility model in the course of the work, utilization monitor 4, CCD camera 5 and optical microscope 6 are assisted the situation that contacts of regulation and control large reluctance magnetic heads 901 and testing sample 1; Ion blower 11 and magnetic head anchor clamps 10 can guarantee that large reluctance magnetic head 901 is not by electrostatic damage; It is 1 milliampere electric current that digital source table 12 provides a constant size for large reluctance magnetic head 901, and gathers the voltage signal of the read output signal end 903 of large reluctance magnetic head 901, and with real-time being delivered in the computing machine 13 of this voltage signal.During work, done slightly to large reluctance magnetic head 901 by the four-dimensional sample adjustment rack 2 of automatically controlled displacement platform 3 drives earlier and approach, z runs business into particular one to testing sample 1 to scanner drive large reluctance magnetic head 901 and approaches.When large reluctance magnetic head 901 has been attached on the surface of testing sample 1 completely, xy drives a zone of large reluctance magnetic head 901 scanning samples on the xy direction to scanner 8, this computer-chronograph 13 has also collected a series of with the coordinate position corresponding voltage signal data of large reluctance magnetic head 901 when scanning testing sample 1 surface in real time by digital source table 12, domain structure and the distribution situation thereof of utilizing the pseudo-colours method these voltage datas to be drawn and can be obtained sample 1 by the software in the computing machine, this data processing software is a common software, pardons me and does not give unnecessary details at this.
Claims (2)
1, a kind of magnetic domain observation apparatus, be characterised in that it constitutes: on automatically controlled displacement platform (3), be fixed with one for the four-dimensional sample adjustment rack (2) of putting testing sample (1), just before be provided with xy to scanner (8) at this four-dimension sample adjustment rack (2), on the square through hole inwall of this xy in the middle of the scanner (8), be provided with the z that moves along the z axle to scanner (7), at this z to the rear end of scanner (7) fixed head anchor clamps (10), the head suspension assembly (9) of large reluctance magnetic head (901) fixedly is equipped with in this magnetic head anchor clamps (10) rear end, side at this large reluctance magnetic head (901) is optical microscope (6), CCD camera (5) and monitor (4), described optical microscope (6) and CCD camera (5) are combined slide block (902) in back and the described head suspension assembly (9) with optical axis and constitute imaging relations, described optical axis is vertical with the z axle, the input end of the described monitor of output termination (4) of described CCD camera (5), the relative ion blower (11) that is provided with of opposite side at described large reluctance magnetic head (901) with described optical microscope (6), the read output signal end (903) of described large reluctance magnetic head (901) links to each other with digital source table (12) by described magnetic head anchor clamps (10), this digital source table (12) provides a constant electric current to described large reluctance magnetic head (901) on the one hand, gather the voltage signal of described large reluctance magnetic head (901) read output signal end (903) simultaneously, the signal output part of this digital source table (12) links to each other with computing machine (13).
2, magnetic domain observation apparatus according to claim 1 is characterized in that described magnetic head anchor clamps (10) are made by antistatic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201197854U CN201210185Y (en) | 2008-03-26 | 2008-06-26 | Magnetic domain observing device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820056588 | 2008-03-26 | ||
| CN200820056588.2 | 2008-03-26 | ||
| CNU2008201197854U CN201210185Y (en) | 2008-03-26 | 2008-06-26 | Magnetic domain observing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210185Y true CN201210185Y (en) | 2009-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201197854U Expired - Fee Related CN201210185Y (en) | 2008-03-26 | 2008-06-26 | Magnetic domain observing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201210185Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320083B (en) * | 2008-03-26 | 2012-05-23 | 中国科学院上海光学精密机械研究所 | Magnetic domain observation apparatus |
| CN112051527A (en) * | 2020-08-11 | 2020-12-08 | 大连理工大学 | Clamping-detecting integrated device and matching method for micro magnetic steel |
-
2008
- 2008-06-26 CN CNU2008201197854U patent/CN201210185Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320083B (en) * | 2008-03-26 | 2012-05-23 | 中国科学院上海光学精密机械研究所 | Magnetic domain observation apparatus |
| CN112051527A (en) * | 2020-08-11 | 2020-12-08 | 大连理工大学 | Clamping-detecting integrated device and matching method for micro magnetic steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 |