Rare earth based magnetic skyrmions material as well as preparation method and application thereof

A magnetic skyrmion, rare earth-based technology, applied in static memory, instruments, digital memory information and other directions, can solve the problems of low phase transition temperature, high cost, high technical difficulty, etc., and achieves simple preparation method, low cost, and composition. controllable effect

Active Publication Date: 2020-04-28
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Information storage requires materials to be stable around room temperature, but the B20 structure magnetic materials and oxide magnetic materials with magnetic skyrmion magnetic domains discovered so far have a low p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment prepares the magnetic skyrmion material of chemical formula Nd20Mn40Ge40, and its preparation method is carried out according to the following specific steps:

[0019] Step 1: According to the molar ratio Nd:Mn:Ge=20:40:40 ratio, respectively weigh Nd, Mn, Ge raw materials with a purity of 99.9%;

[0020] Step 2: Put the weighed raw materials into a water-cooled crucible, and under the protection of Ar gas, heat the raw materials melted by electric arc until melting and keep for 1 minute;

[0021] Step 3: Turn over the product obtained in Step 2, heat it again by arc melting until it melts, and keep it for 1 minute, repeat this step 3 times;

[0022] Step 4: heating the obtained Nd20Mn40Ge40 ingot to 600 degrees Celsius and annealing under vacuum for 48 hours to obtain a polycrystalline block.

[0023] Using magnetic measurements and Lorentz electron microscopy to test the above-obtained bulk, it is shown that the material forms stable skyrmion magnetic...

Embodiment 2

[0025] This embodiment prepares the magnetic skyrmion material of chemical formula Pr22Mn38Ge40, and its preparation method is carried out according to the following specific steps:

[0026] Step 1: According to the ratio of Pr:Mn:Ge=22:38:40 in molar ratio, respectively weigh Pr, Mn, Ge raw materials with a purity of 99.9%;

[0027] Step 2: Put the weighed raw materials into a water-cooled crucible, and under the protection of Ar gas, heat the raw materials for induction melting until melting and keep for 2 minutes;

[0028] Step 3: Turn over the product obtained in Step 2, heat it again by arc melting until it melts, and keep it for 1 minute;

[0029] Step 4: heating the obtained Pr22Mn38Ge40 ingot to 900 degrees Celsius and annealing under vacuum for 68 hours to obtain a polycrystalline block.

[0030] Using magnetic measurement and Lorentz electron microscopy to test the above-obtained bulk body, it is shown that the material has a skyrmion magnetic domain structure in th...

Embodiment 3

[0032] This embodiment prepares the magnetic skyrmion material of chemical formula Yb12La10Mn35Ge39Fe2Si2, and its preparation method is carried out according to the following specific steps:

[0033] Step 1: According to the ratio of molar ratio Yb:La:Mn:Ge:Fe:Si=12:10:35:39:2:2, respectively weigh Yb, La, Mn, Ge, Fe, Si raw material;

[0034] Step 2: Put the weighed raw materials into a water-cooled crucible, and under the protection of Ar gas, heat the raw materials melted by electric arc until melting and keep for 1 minute;

[0035] Step 3: Turn over the product obtained in Step 2, heat it again by arc melting until it melts, and keep it for 3 minutes, repeat this step 3 times;

[0036] Step 4: heating the obtained Yb12La10Mn35Ge39Fe2Si2 ingot to 200 degrees Celsius and annealing under vacuum for 48 hours to obtain a polycrystalline block.

[0037] Using the magnetic measurement and the Lorentz electron microscope to test the above obtained block, it shows that the Yb20M...

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Abstract

The invention provides a rare earth based magnetic skyrmions material as well as a preparation method and application thereof. The general chemical formula of the magnetic skyrmions material is rare earth Ra(Mn<1-x>Ge<1+x>)bZc, wherein R is one of or a mixture of more of Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm and Yb, and Z is one or more of Fe, Co, Ni, Cu, Zn, Al, Mg, Si, Sn and Cd; and a is larger than or equal to 20 and smaller than or equal to 25, b is larger than or equal to 75 and smaller than or equal to 80, x is larger than or equal to 0 and smaller than or equal to 0.1, c is larger than or equal to 0 and smaller than or equal to 10, the sum of a, b and c is 100, and a, b, c and x represent atomic percent contents. The rare earth based magnetic skyrmions material has a magnetic skyrmions structure in the temperature range of 20 K-400 K, has low raw material cost and controllable components and is an ideal skyrmions-based candidate material for magnetic storage and logicaloperation, and the method is simple in process and applicable to industrialization.

Description

technical field [0001] The invention relates to a rare-earth-based magnetic functional material, in particular to a rare-earth-based magnetic skyrmion material, a preparation method and an application thereof. Background technique [0002] With the increasing degree of social informatization, the requirements for information storage equipment are getting higher and higher. Storage technologies with higher storage density, lower energy consumption, and faster read and write speeds require continuous development of new technologies and materials. [0003] In recent years, the research on magnetic skyrmions (Skyrmions) has been continuously developed, and information storage can be realized by using the generation and annihilation of magnetic skyrmions. At present, non-centrosymmetric B20 structure magnetic materials, multiferroic materials Cu 2 OSo 3 Magnetic skyrmion domain structures have been found in Mn-Zn ferrite materials, antiferromagnetically coupled double-layer an...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C30/02C22C30/04C22C30/06C22C1/02C22F1/02G11C13/02
CPCC22C1/02C22C28/00C22C30/00C22C30/02C22C30/04C22C30/06C22F1/02G11C13/02
Inventor 李领伟侯志鹏
Owner HANGZHOU DIANZI UNIV
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