Magnetic field device for magnetic force microscope

Abstract

The invention discloses a magnetic field device for a magnetic microscope, and relates to the technical field of magnetic field devices. Comprising a table body; a turntable is rotationally arranged on the table body; a sample clamp is arranged on the turntable; a first magnetic field mechanism is arranged on the table body; a second magnetic field mechanism is arranged in the table body, and a driving mechanism for driving the turntable to rotate is arranged in the table body; and a stress loading mechanism is also arranged in the table body. By arranging the driving mechanism and the turntable, angle adjustment of the sample is realized; the size and the direction of the magnetic field in the horizontal direction of the first magnetic field mechanism are adjusted, so that the possibility of comprehensively characterizing the anisotropy of the magnetic material is expanded; by arranging the stress loading mechanism, upward stress of different sizes is applied to the sample, and deep research on magnetic domain change under the stress influence is improved; by arranging the second magnetic field mechanism, the size and direction of the magnetic field in the vertical direction are adjusted, and the possibility of comprehensive representation of the magnetic material in different magnetic field environments is widened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic field devices, in particular to a magnetic field device for magnetic force microscopy. BACKGROUND

[0002] Magnetic force microscopy (MFM) is a high-resolution imaging technique that uses the magnetic force interaction between a magnetized tip and a sample to probe the magnetic domain structure of the sample. Traditional MFM technology can only achieve the application of a magnetic field perpendicular to the surface of the sample, limiting the comprehensive characterization of anisotropic magnetic materials and different planes. In addition, traditional MFM technology lacks the ability to fix thin films of samples when performing stress tests and magnetic domain observations, limiting in-depth research on the changes in magnetic domains under stress. With the widespread application of magnetic materials in storage, spintronics and other fields, higher technical requirements are put forward for the microscopic study of magnetism. Existing magnetic imaging techniques such as magneto-optical Kerr microscopy (MOKE) and Lorentz transmission electron microscopy (L-TEM) each have advantages and limitations. As one of them, magnetic force microscopy needs further technical improvement to meet the demand for more precise magnetic measurements. Therefore, a magnetic field device for magnetic force microscopy is proposed. SUMMARY

[0003] The main purpose of the present application is to provide a magnetic field device for magnetic force microscopy to solve the above problems.

[0004] To achieve the above purpose, the present application provides a magnetic field device for magnetic force microscopy, comprising a table body; a turntable is rotatably arranged on the table body; a sample clamp is arranged on the turntable; a first magnetic field mechanism is arranged on the table body; a second magnetic field mechanism is arranged in the table body; a driving mechanism for driving the rotation of the turntable is arranged in the table body; and a stress loading mechanism is further arranged in the table body.

[0005] Further, the table body comprises a surface platform, a left support plate, a right support plate and a rear support plate; the two ends of the rear support plate are respectively connected to the left support plate and the right support plate; the surface platform is fixedly installed on the left support plate and the right support plate; the turntable is rotatably arranged on the surface platform; and mounting plates are fixedly arranged on the left support plate and the right support plate.

[0006] Further, the driving mechanism comprises a first motor, a driving gear, a driven gear and a transmission shaft; the first motor is installed on the mounting plate on the left support plate; the driving gear is installed on the output end of the first motor; the driven gear is installed on the transmission shaft and engages with the driving gear; and the top end of the transmission shaft is fixedly connected to the turntable.

[0007] Further, the transmission shaft comprises a support pile, a connector and a gear shaft; the top end of the support pile is fixedly connected with the rotating disc; the bottom end of the support pile is connected with the gear shaft through the connector; and the driven gear is fixedly installed on the gear shaft.

[0008] Further, the driving mechanism further comprises a first sensor for detecting the rotation angle of the first motor.

[0009] Further, the stress loading mechanism comprises a threaded rod; a threaded hole is arranged on the mounting plate on the left supporting plate, and the threaded rod is screwed in the threaded hole; and the middle part of the sample clamp, the rotating disc and the transmission shaft are all provided with through holes for the threaded rod to pass through.

[0010] Further, the bottom of the threaded rod is provided with a rotating handle.

[0011] Further, the first magnetic field mechanism comprises a second motor, a bidirectional screw rod, an end support, a first sliding rail, a first sliding block and an N / S pole block-shaped magnet; the second motor, the end support and the first sliding rail are all installed on the surface platform, one end of the bidirectional screw rod is connected with the output end of the second motor, and the other end is rotationally connected with the end support; the first sliding block is slidingly arranged on the first sliding rail; the first sliding block is provided with two, and the two first sliding blocks are both provided with the N / S pole block-shaped magnet; the two N / S pole block-shaped magnets are oppositely arranged and respectively located on the front and back sides of the rotating disc; and the two first sliding blocks are respectively provided with a left-handed nut and a right-handed nut matched with the bidirectional screw rod.

[0012] Further, the first magnetic field mechanism further comprises a second sensor and a sensor support; the sensor support is fixed on the surface platform, and the second sensor is installed in the sensor support; and the second sensor is used for detecting the position of the first sliding block.

[0013] Further, the second magnetic field mechanism comprises a third motor, a unidirectional screw rod, a second sliding rail, a second sliding block, a support column and an N / S pole columnar magnet; the third motor is installed on the mounting plate on the right supporting plate; the lower end of the unidirectional screw rod is connected with the output end of the third motor; the second sliding rail is vertically installed on the mounting plate on the right supporting plate; the second sliding block is slidingly arranged on the second sliding rail; the middle part of the second sliding block is provided with a screw pair matched with the unidirectional screw rod; the support column is provided with two and respectively installed on the two ends of the second sliding block; the top of the two support columns is provided with the N / S pole columnar magnet; and the surface platform is provided with a long hole for the N / S pole columnar magnet to pass through.

[0014] The present application has the following beneficial effects:

[0015] 1、The present application realizes the angle adjustment of the sample by setting the driving mechanism and the rotating disc; the horizontal direction magnetic field size and direction adjustment is realized by setting the first magnetic field mechanism, and the possibility of comprehensive characterization of the anisotropy of the magnetic material is widened.

[0016] 2、The present application improves the in-depth study of the magnetic domain change under the influence of stress by setting the stress loading mechanism to exert different sizes of upward stress on the sample.

[0017] 3、The present application realizes the vertical direction magnetic field size and direction adjustment by setting the second magnetic field mechanism, and the possibility of comprehensive characterization of the magnetic material under different magnetic field environments is widened. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole schematic view of a magnetic field device for a magnetic force microscope proposed by the present application;

[0019] Figure 2 It is a surface platform schematic view of a magnetic field device for a magnetic force microscope proposed by the present application;

[0020] Figure 3 It is a driving mechanism schematic view of a magnetic field device for a magnetic force microscope proposed by the present application;

[0021] Figure 4 It is a stress loading mechanism schematic view of a magnetic field device for a magnetic force microscope proposed by the present application;

[0022] Figure 5 It is a second magnetic field mechanism schematic view of a magnetic field device for a magnetic force microscope proposed by the present application. In the figure: 1, rear support plate; 2, left support plate; 3, right support plate; 4, surface platform; 5, mounting plate; 6, first motor; 7, third motor; 8, driven gear; 9, dial; 10, connector; 11, second sensor; 12, second motor; 13, threaded rod; 14, bidirectional screw; 15, unidirectional screw; 16, rotating disc; 17, end support; 18, long hole; 19, N / S pole block magnet; 20, N / S pole columnar magnet; 21, second sliding block; 22, support pile; 23, sensor support; 24, first sliding rail; 25, first sliding block; 26, gear shaft; 27, support column; 28, sample clamp; 29, driving gear; 30, first sensor. DETAILED DESCRIPTION

[0023] In order to achieve the above-mentioned purposes and effects, the technical means and structure adopted by the present application are described in detail in combination with the preferred embodiments of the present application, and the characteristics and functions are described.

[0024] For example, Figures 1-5As shown, the magnetic field device for magnetic microscopy provided in the present application comprises a table body; a rotating disc 16 is arranged on the table body; a scale disc 9 is arranged on the rotating disc 16; a sample clamp 28 is arranged on the rotating disc 16; a first magnetic field mechanism is arranged on the table body; a second magnetic field mechanism is arranged in the table body; a driving mechanism for driving the rotating disc to rotate is arranged in the table body; and a stress loading mechanism is further arranged in the table body.

[0025] The table body comprises a surface platform 4, a left supporting plate 2, a right supporting plate 3 and a rear supporting plate 1; the two ends of the rear supporting plate 1 are connected with the left supporting plate 2 and the right supporting plate 3 respectively; the surface platform 4 is fixedly installed on the left supporting plate 2 and the right supporting plate 3; the rotating disc 16 is rotatably arranged on the surface platform 4; and the left supporting plate 2 and the right supporting plate 3 are both fixedly provided with a mounting plate 5.

[0026] In another embodiment, the driving mechanism comprises a first motor 6, a driving gear 29, a driven gear 8 and a transmission shaft; the first motor 6 is installed on the mounting plate 5 located on the left supporting plate 2; the driving gear 29 is installed on the output end of the first motor 6; the driven gear 8 is installed on the transmission shaft and is engaged with the driving gear 29; and the top end of the transmission shaft is fixedly connected with the rotating disc 16. The first motor 6 drives the driving gear 29 to rotate, thereby driving the driven gear 8, the transmission shaft, the rotating disc 16 and the sample clamp 28 to rotate synchronously, so as to realize the angle adjustment of the sample.

[0027] Specifically, the transmission shaft comprises a supporting pile 22, a connector 10 and a gear shaft 26; the top end of the supporting pile 22 is fixedly connected with the rotating disc 16; the bottom end of the supporting pile 22 is connected with the gear shaft 26 through the connector 10; and the driven gear 8 is fixedly installed on the gear shaft 26.

[0028] In another embodiment, the driving mechanism further comprises a first sensor 30, which is used for detecting the rotation angle of the first motor 6, so as to realize the accurate angle adjustment.

[0029] The stress loading mechanism comprises a threaded rod 13; a threaded hole is arranged on the mounting plate 5 located on the left supporting plate 2, and the threaded rod 13 is screwed in the threaded hole; and the middle part of the sample clamp 28, the rotating disc 16 and the transmission shaft are all provided with through holes for the threaded rod 13 to pass through. As a preferred embodiment, the bottom of the threaded rod 13 is provided with a rotating handle (not shown). The rotating handle is operated to drive the threaded rod 13 to rotate, thereby making the top end of the threaded rod 13 press the sample in the sample clamp 28 upward, so as to exert upward stress on the sample, which improves the in-depth study on the magnetic domain change under the influence of stress.

[0030] In another embodiment, the first magnetic field mechanism comprises a second motor 12, a bidirectional screw rod 14, an end support 17, a first sliding rail 24, a first sliding block 25 and an N / S pole block magnet 19; the second motor 12, the end support 17 and the first sliding rail 24 are all mounted on the surface platform 4, one end of the bidirectional screw rod 14 is connected with the output end of the second motor 12, and the other end is rotationally connected with the end support 17; the first sliding block 25 is slidingly arranged on the first sliding rail 24; the first sliding block 25 is provided with two, and the two first sliding blocks 25 are both provided with the N / S pole block magnet 19; the two N / S pole block magnets 19 are oppositely arranged and respectively located on the front and rear sides of the rotating disc 16; the two first sliding blocks 25 are respectively provided with a left-handed nut and a right-handed nut matched with the bidirectional screw rod 14. The second motor 12 drives the bidirectional screw rod 14 to rotate, and then drives the two first sliding blocks 25 to move towards each other or away from each other, so as to realize the forward and backward movement of the N / S pole block magnet 19, and widen the possibility of comprehensive characterization of the anisotropy of the magnetic material in all directions.

[0031] The first magnetic field mechanism further comprises a second sensor 11 and a sensor support 23; the sensor support 23 is fixed on the surface platform 4, and the second sensor 11 is mounted in the sensor support 23; the second sensor 11 is used for detecting the position of the first sliding block 25.

[0032] In another embodiment, the second magnetic field mechanism comprises a third motor 7, a unidirectional screw rod 15, a second sliding rail, a second sliding block 21, a support column 27 and an N / S pole column magnet 20; the third motor 7 is mounted on the mounting plate 5 located on the right support plate 3; the lower end of the unidirectional screw rod 15 is connected with the output end of the third motor 7; the second sliding rail is vertically mounted on the mounting plate 5 located on the right support plate 3; the second sliding block 21 is slidingly arranged on the second sliding rail; the middle part of the second sliding block 21 is provided with a screw pair matched with the unidirectional screw rod 15; the support column 27 is provided with two and is respectively mounted on both ends of the second sliding block 21; the top of the two support columns 27 is provided with the N / S pole column magnet 20; the surface platform 4 is provided with a long hole 18 for the N / S pole column magnet 20 to pass through. The third motor 7 drives the unidirectional screw rod 15 to rotate, so that the second sliding block 21 moves up and down along the second sliding block 21, and the N / S pole column magnet 20 moves up and down, so as to realize the conversion of the size and direction of the vertical magnetic field, and widen the possibility of comprehensive characterization of the magnetic material in different planes.

[0033] The above only describes the preferred embodiments of the present application, not all embodiments, and anyone should know that any structural change made under the inspiration of the present application, any technical solution with the same or similar to the present application, all belong to the protection scope of the present application.

Claims

1. A magnetic field device for magnetic force microscopy, characterized by The table body is provided with a first magnetic field mechanism, a second magnetic field mechanism, a driving mechanism for driving the rotation of the rotating disc, and a stress loading mechanism.

2. A magnetic field device for a magnetic force microscope as defined in claim 1, characterized in that The table body comprises a surface platform (4), a left support plate (2), a right support plate (3), and a rear support plate (1); the two ends of the rear support plate (1) are connected to the left support plate (2) and the right support plate (3) respectively; the surface platform (4) is fixedly installed on the left support plate (2) and the right support plate (3); the rotating disc (16) is rotatably arranged on the surface platform (4); the left support plate (2) and the right support plate (3) are each fixedly provided with a mounting plate (5).

3. A magnetic field device for a magnetic force microscope as defined in claim 2, characterized in that The driving mechanism comprises a first motor (6), a driving gear (29), a driven gear (8), and a transmission shaft; the first motor (6) is installed on the mounting plate (5) located on the left support plate (2); the driving gear (29) is installed on the output end of the first motor (6); the driven gear (8) is installed on the transmission shaft and is engaged with the driving gear (29); the top end of the transmission shaft is fixedly connected with the rotating disc (16).

4. A magnetic field device for a magnetic force microscope as defined in claim 3, characterized in that The transmission shaft comprises a support pile (22), a connector (10), and a gear shaft (26); the top end of the support pile (22) is fixedly connected with the rotating disc (16); the bottom end of the support pile (22) is connected with the gear shaft (26) through the connector (10); the driven gear (8) is fixedly installed on the gear shaft (26).

5. A magnetic field device for a magnetic force microscope according to claim 2 or 3, characterized in that The driving mechanism further comprises a first sensor (30) for detecting the rotation angle of the first motor (6).

6. A magnetic field device for a magnetic force microscope as defined in claim 5, characterized in that The stress loading mechanism comprises a threaded rod (13); the mounting plate (5) located on the left support plate (2) is provided with a threaded hole, and the threaded rod (13) is screwed into the threaded hole; the sample clamp (28), the rotating disc (16), and the middle part of the transmission shaft are each provided with a through hole for the threaded rod (13) to pass through.

7. A magnetic field device for a magnetic force microscope as defined in claim 6, characterized in that The bottom of the threaded rod (13) is provided with a rotating handle.

8. A magnetic field device for a magnetic force microscope as defined in claim 1, wherein The first magnetic field mechanism comprises a second motor (12), a bidirectional screw (14), an end support (17), a first sliding rail (24), a first sliding block (25), and an N / S pole block-shaped magnet (19); the second motor (12), the end support (17), and the first sliding rail (24) are all installed on the surface platform (4); one end of the bidirectional screw (14) is connected with the output end of the second motor (12), and the other end is rotatably connected with the end support (17); the first sliding block (25) is slidably arranged on the first sliding rail (24); the first sliding block (25) is provided with two, and each of the two first sliding blocks (25) is provided with an N / S pole block-shaped magnet (19); the two N / S pole block-shaped magnets (19) are oppositely arranged and located on the front and rear sides of the rotating disc (16); each of the two first sliding blocks (25) is provided with a left-handed nut and a right-handed nut matched with the bidirectional screw (14).

9. A magnetic field device for a magnetic force microscope according to claim 8, wherein The first magnetic field mechanism further comprises a second sensor (11) and a sensor support (23); the sensor support (23) is fixed on the surface platform (4), and the second sensor (11) is installed in the sensor support (23); the second sensor (11) is used for detecting the position of the first sliding block (25).

10. A magnetic field device for a magnetic force microscope according to claim 9, wherein The second magnetic field mechanism comprises a third motor (7), a one-way screw rod (15), a second sliding rail, a second sliding block (21), a support column (27) and an N / S pole columnar magnet (20); the third motor (7) is installed on the mounting plate (5) located on the right support plate (3); the lower end of the one-way screw rod (15) is connected with the output end of the third motor (7); the second sliding rail is vertically installed on the mounting plate (5) located on the right support plate (3); the second sliding block (21) is slidingly arranged on the second sliding rail; the middle part of the second sliding block (21) is provided with a screw pair matched with the one-way screw rod (15); the support column (27) is provided with two, which are respectively installed at two ends of the second sliding block (21); the top of the two support columns (27) is provided with the N / S pole columnar magnet (20); the surface platform (4) is provided with a long hole (18) for the N / S pole columnar magnet (20) to pass through.

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