CN111162163B - Construction method of one-dimensional magnetic vortex chain - Google Patents
Construction method of one-dimensional magnetic vortex chain Download PDFInfo
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- CN111162163B CN111162163B CN202010006980.1A CN202010006980A CN111162163B CN 111162163 B CN111162163 B CN 111162163B CN 202010006980 A CN202010006980 A CN 202010006980A CN 111162163 B CN111162163 B CN 111162163B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H10N50/00—Galvanomagnetic devices
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- H—ELECTRICITY
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- H10N50/00—Galvanomagnetic devices
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Abstract
The invention belongs to the field of magnetic information storage and transmission, and relates to a construction method of a one-dimensional magnetic vortex chain. The adopted main body is a channel structure processed on a film prepared by a ferromagnetic material containing Fe, co or Ni elements in a nano-structure micro-processing mode; the channel structure comprises a ferromagnetic nanoribbon, a ferromagnetic nanodisk, a bias nanomagnet and a vortex coupling nanoribbon; firstly, the main body is demagnetized, then different magnetic fields are respectively applied to the main body for three times, and different one-dimensional magnetic vortex chains can be coupled. The invention can control the length of the magnetic vortex chain by adjusting the number of the ferromagnetic nano disks and the orientation of the bias nano magnet. The invention can be used in the important fields of magnetic information storage, magnetic devices, magnetic topological structures, magnetic information processing and the like.
Description
Technical Field
The invention belongs to the field of magnetic information storage and transmission, and relates to a construction method of a one-dimensional magnetic vortex chain.
Background
Magnetic vortices are a basic magnetic topology and are usually present in ferromagnetic materials containing Fe, co, ni elements. In recent years, studies on important scientific problems such as the construction of a magnetic vortex structure have attracted extensive academic attention, and the studies on the problems have contributed to the realization of ultra-miniaturization, multi-functionalization, low power consumption, and high integration of a magnetic device related to spintronics. However, the prior art methods mainly focus on the construction of single or two magnetic vortexes, and no report has been made on the construction method of a one-dimensional magnetic vortex chain.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for constructing a one-dimensional magnetic vortex chain.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a one-dimensional magnetic vortex chain construction method, the main body adopted is a channel structure processed on a film prepared by ferromagnetic materials containing Fe, co or Ni elements by a nano-structure micromachining mode; the channel structure comprises a ferromagnetic nanoribbon 1, a ferromagnetic nanodisk 2, a bias nanomagnet 3 and a vortex coupling nanoribbon 4.
The ferromagnetic nano disc 2 is used for generating a magnetic vortex and has a symmetrical structure; the number of the ferromagnetic nano disks 2 is equal to that of the ferromagnetic nano belts 1; the ferromagnetic nanodisk 2 may be shaped in a symmetrical pattern such as a square or circle.
The ferromagnetic nanobelt 1 is rectangular, the width is less than 800nm, and the length is more than 2 μm; one end of the ferromagnetic nanobelt 1 is communicated with the ferromagnetic nanodisk 2, and the two are mutually vertical and coaxial; the number of the ferromagnetic nanoribbons 1 is at least 2, and the specific number is determined by the length of the magnetic vortex chain.
The bias nano magnet 3 is used for regulating and controlling the hand shape of the magnetic vortex and is in a parallelogram shape; the bias nano magnet 3 and the ferromagnetic nano belt 1 are mutually crossed and communicated to form an X shape, and the included angle theta between the bias nano magnet and the ferromagnetic nano belt is 30-80 degrees or 100-150 degrees; the ferromagnetic nano disk 2 is taken as an original point, the ferromagnetic nano belt 1 is taken as a + y axis, the ferromagnetic nano disk 2 is taken as a + x axis towards the right, and the included angle between the bias nano magnet 3 at one side of the-x axis and the ferromagnetic nano belt 1 is theta.
The vortex coupling nanobelt 4 is used for coupling a one-dimensional magnetic vortex chain and is in a parallelogram shape; the long side of the vortex coupling nano belt 4 is communicated with the other end of the ferromagnetic nano belt 1, the two are perpendicular to each other, and the ferromagnetic nano belt 1 is located on the same side of the vortex coupling nano belt 4.
The number of the ferromagnetic nanodisks 2 is n, and n is more than or equal to 2; when the directions of the biased nanomagnets 3 are consistent, an N vortex chain structure is generated, wherein N =2N-1; when at least one direction of the biased nanomagnets 3 is opposite, an M vortex chain structure is generated, wherein M =2n-2.
The film prepared from the ferromagnetic material is prepared by the traditional magnetron sputtering technology, and the nanostructure micromachining is prepared by the traditional electron beam exposure and ion beam etching method.
The specific construction process is as follows:
firstly, demagnetizing a main body, and spontaneously generating a magnetic vortex structure in the ferromagnetic nano disc 2;
secondly, applying a magnetic field to the main body, wherein the size of the magnetic field is 50-1000Oe, the direction of the magnetic field is parallel to the ferromagnetic nanoribbon 1, a magnetic vortex is injected into the ferromagnetic nanoribbon 1 from the ferromagnetic nanodisk 2, and the magnetic vortex is positioned at the front end of the bias nanomagnet 3;
thirdly, changing the configuration of an applied magnetic field, wherein the size of the magnetic field is 100-1000Oe, the size of the magnetic field is larger than that in the second step, the direction of the magnetic field is parallel to the ferromagnetic nanoribbon 1, and the magnetic vortex passes through the cross part of the bias nanomagnet 3 and the ferromagnetic nanoribbon 1, then passes through the bias nanomagnet 3 to enter the ferromagnetic nanoribbon 1, and then enters the vortex coupling nanoribbon 4 through the ferromagnetic nanoribbon 1;
and fourthly, changing the configuration of an applied magnetic field, wherein the size of the magnetic field is 10-1000Oe, the direction of the magnetic field is parallel to the vortex coupling nanoribbon 4, and a plurality of magnetic vortexes are coupled in the vortex coupling nanoribbon 4 to form a one-dimensional magnetic vortex chain.
The magnitude of the magnetic field applied in each step depends on the specific composition of the ferromagnetic material.
The invention has the beneficial effects that: the method can construct a one-dimensional magnetic vortex chain structure, and can control the length of the magnetic vortex chain by adjusting the number of the ferromagnetic nano disks and the orientation of the offset nano magnet. The invention is helpful to realize the ultramicro, multifunction, low energy consumption and high integration of the related magnetic device of the spintronics; the magnetic information storage device can be used in important fields of magnetic information storage, magnetic devices, magnetic topological structures, magnetic information processing and the like.
Drawings
FIG. 1 is an SEM image of a main structure used in constructing an N-type magnetic vortex chain; wherein the white horizontal line represents 2 μm.
Fig. 2 is a magnetic microscope image when a magnetic field is applied for the first time when an N magnetic vortex chain is constructed.
Fig. 3 is a magnetic microscope image when a magnetic field is applied for the second time when an N magnetic vortex chain is constructed.
Fig. 4 is a magnetic microscope image when a magnetic field is applied for the third time when an N magnetic vortex chain is constructed.
FIG. 5 is an SEM image of the main structure used in the construction of the M magnetic vortex chain, in which white horizontal lines represent 2 μ M.
Fig. 6 is a magnetic microscope image when a magnetic field is applied for the first time when an M magnetic vortex chain is constructed.
Fig. 7 is a magnetic microscope image when a magnetic field is applied for the second time when an M magnetic vortex chain is constructed.
Fig. 8 is a magnetic microscope image when a magnetic field is applied for the third time when an M magnetic vortex chain is constructed.
In the figure: 1 ferromagnetic nanobelt; 2 ferromagnetic nanodiscs; 3 biasing the nanomagnet; 4 vortex coupling nanoribbons.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
The method of constructing the N-vortex chain is shown in FIGS. 1 to 4. Fig. 1 is an SEM image of the host structure employed, including: a ferromagnetic nanoribbon 1, a ferromagnetic nanodisk 2, a bias nanomagnet 3, and a vortex coupling nanoribbon 4. The body demagnetizes along the-x direction, and a magnetic vortex structure is spontaneously generated in the ferromagnetic nanodisk 2. FIG. 2 is a magnetic microscope image of the first application of a magnetic field with an applied field of 75Oe oriented along the y-axis and three magnetic vortices injected from the ferromagnetic nanodisks 2 into the ferromagnetic nanoribbons 1. FIG. 3 is a magnetic microscope image of a second applied magnetic field with an applied field magnitude of 150Oe and direction along the y-axis. Three magnetic vortexes are injected into the vortex coupling nano-belt 4 from the ferromagnetic nano-belt 1 after passing through the bias nano-magnet 3. FIG. 4 is a magnetic microscope image of a third applied magnetic field with an applied magnetic field of 30Oe oriented along the x-axis, three magnetic vortices coupled to form a five-vortex chain structure. Based on the nanostructure of the body, the bias nanomagnet 3 is uniformly oriented, and by further increasing the number N of the ferromagnetic nanodisks 2, an N-vortex chain structure (N =3,5,7.. Times., N = 2N-1) can be formed, which satisfies N =2N-1.
A method of constructing an M-vortex chain (M =2,4, 6.) is shown in fig. 5 to 8. FIG. 5 is an SEM image of the subject. The body demagnetizes along the-x direction, and a magnetic vortex structure is spontaneously generated in the ferromagnetic nanodisk 2. Fig. 6 is a magnetic force microscope image when a magnetic field is applied for the first time, the magnitude of the applied magnetic field is 80Oe, the direction is along the y-axis, and three magnetic vortices are injected from the ferromagnetic nanodisks 2 to the ferromagnetic nanobelts 1. Fig. 7 is a magnetic force microscope image of the second time of magnetic field application, with an applied magnetic field of 160Oe oriented along the y-axis, with three magnetic vortices injected from ferromagnetic nanoribbon 1 to vortex-coupled nanoribbon 4 after passing through bias nanomagnet 3. FIG. 8 is a magnetic microscope image of a third applied magnetic field with an applied magnetic field of 30Oe oriented along the x-axis, three magnetic vortices coupled to form a four-vortex chain structure. Based on the nanostructure of the body, it is ensured that one biased nanomagnet 3 has a different orientation, and by further increasing the number n of ferromagnetic nanodiscs 2, an M-vortex chain structure (M =2,4, 6.) can be formed, satisfying M =2n-2.
Claims (3)
1. A one-dimensional magnetic vortex chain construction method is characterized in that the adopted main body is a channel structure processed on a film prepared by ferromagnetic materials containing Fe, co or Ni elements in a nano-structure micromachining mode; the channel structure comprises a ferromagnetic nano-belt (1), a ferromagnetic nano-disc (2), a bias nano-magnet (3) and a vortex coupling nano-belt (4);
the ferromagnetic nano disc (2) is used for generating a magnetic vortex and has a symmetrical structure; the number of the ferromagnetic nano discs (2) is equal to that of the ferromagnetic nano belts (1);
the ferromagnetic nanobelt (1) is rectangular, the width of the ferromagnetic nanobelt is less than 800nm, and the length of the ferromagnetic nanobelt is more than 2 mu m; one end of the ferromagnetic nanobelt (1) is communicated with the ferromagnetic nanodisk (2), and the two are mutually vertical and coaxial; the number of the ferromagnetic nanobelts (1) is at least 2, and the specific number is determined by the length of the magnetic vortex chain;
the bias nano magnet (3) is used for regulating and controlling the hand shape of the magnetic vortex and is in a parallelogram shape; the bias nano magnet (3) and the ferromagnetic nano belt (1) are mutually communicated in a cross way to form an X shape, and the included angle theta between the bias nano magnet and the ferromagnetic nano belt is 30-80 degrees or 100-150 degrees;
the vortex coupling nanobelt (4) is used for coupling a one-dimensional magnetic vortex chain and is in a parallelogram shape; the long side of the vortex coupling nano belt (4) is communicated with the other end of the ferromagnetic nano belt (1), the two sides are perpendicular to each other, and the ferromagnetic nano belt (1) is positioned on the same side of the vortex coupling nano belt (4);
the specific construction process is as follows:
firstly, demagnetizing a main body, and spontaneously generating a magnetic vortex structure in the ferromagnetic nano disc (2);
secondly, applying a magnetic field to the main body, wherein the size of the magnetic field is 50-1000Oe, the direction of the magnetic field is parallel to the ferromagnetic nanobelt (1), a magnetic vortex is injected into the ferromagnetic nanobelt (1) from the ferromagnetic nanodisk (2), and the magnetic vortex is positioned at the front end of the bias nanomagnet (3);
thirdly, changing the configuration of an applied magnetic field, wherein the size of the magnetic field is 100-1000Oe, the size of the magnetic field is larger than that of the magnetic field in the second step, the direction of the magnetic field is parallel to the ferromagnetic nanoribbon (1), and the magnetic vortex passes through the crossed part of the bias nanomagnet (3) and the ferromagnetic nanoribbon (1), then passes through the bias nanomagnet (3) to enter the ferromagnetic nanoribbon (1), and then enters the vortex coupling nanoribbon (4) through the ferromagnetic nanoribbon (1);
and fourthly, changing the configuration of an applied magnetic field, wherein the size of the magnetic field is 10-1000Oe, the direction of the magnetic field is parallel to the vortex coupling nanoribbon (4), and a plurality of magnetic vortexes are coupled in the vortex coupling nanoribbon (4) to form a one-dimensional magnetic vortex chain.
2. The construction method of one-dimensional magnetic vortex chain according to claim 1, wherein the number of ferromagnetic nanodisks (2) is n, n is not less than 2; when the directions of the bias nanomagnets (3) are consistent, an N vortex chain structure is generated, wherein N =2N-1; when at least one direction of the biased nanomagnets (3) is opposite, an M vortex chain structure is generated, wherein M =2n-2.
3. The method for constructing a one-dimensional magnetic vortex chain according to claim 1 or 2, wherein the ferromagnetic material is prepared into a thin film by using a conventional magnetron sputtering technology, and the nanostructure micromachining is prepared by using a conventional electron beam exposure and ion beam etching method.
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Citations (5)
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| CN101273406A (en) * | 2005-09-29 | 2008-09-24 | 财团法人首尔大学校产学协力财团 | Method of generating strong spin waves and spin devices for ultra-high speed information processing using spin waves |
| CN101363903A (en) * | 2008-09-16 | 2009-02-11 | 北京科技大学 | Magnetic field sensor utilizing ferromagnetic nanometer ring strong magnetic resistance effect |
| CN104575583A (en) * | 2014-11-14 | 2015-04-29 | 电子科技大学 | Vortex state magnetic storage unit of nano unit structure |
| CN107093801A (en) * | 2017-05-02 | 2017-08-25 | 西安电子科技大学 | High-gain orbital angular momentum array antenna based on the super surface of individual layer electromagnetism |
| CN110543646A (en) * | 2018-05-28 | 2019-12-06 | 刘照森 | Quantum mechanics simulation method for Magstar and magnetic vortex lattices |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009051442A2 (en) * | 2007-10-19 | 2009-04-23 | Snu R & Db Foundation | Method for read-out of information in magnetic recording element and method for read-out of information in magnetic random access memory |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101273406A (en) * | 2005-09-29 | 2008-09-24 | 财团法人首尔大学校产学协力财团 | Method of generating strong spin waves and spin devices for ultra-high speed information processing using spin waves |
| CN101363903A (en) * | 2008-09-16 | 2009-02-11 | 北京科技大学 | Magnetic field sensor utilizing ferromagnetic nanometer ring strong magnetic resistance effect |
| CN104575583A (en) * | 2014-11-14 | 2015-04-29 | 电子科技大学 | Vortex state magnetic storage unit of nano unit structure |
| CN107093801A (en) * | 2017-05-02 | 2017-08-25 | 西安电子科技大学 | High-gain orbital angular momentum array antenna based on the super surface of individual layer electromagnetism |
| CN110543646A (en) * | 2018-05-28 | 2019-12-06 | 刘照森 | Quantum mechanics simulation method for Magstar and magnetic vortex lattices |
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