Use and preparation method of Fe3Sn2 material

Abstract

The invention provides the use of a Fe3Sn2 material as a magnetic storage material. The Fe3Sn2 material has a room temperature magnetic Skyrmion nano-magnetic domain structure and can be used as a magnetic storage material for a magnetic memory.

Description

technical field [0001] The present invention relates to a kind of Fe 3 sn 2 The use of magnetic material and its preparation method. Background technique [0002] Magnetic skyrmions (Magnetic Skyrmions) are a new class of magnetic domain structures with vortex spins, which have (1) extremely small size (10-100nm); (2) topological protection (not affected by impurities, etc. interference); (3) low critical domain switching current density (<10 6 A / m 2 )Features. Applying it to the field of magnetic storage can effectively solve the problems that restrict the development of current magnetic storage devices (paramagnetic physical limit, volatility and Joule heating, etc.), so it is very promising to be applied to high-density and low-energy magnetic storage and self-storage A new generation of spintronic devices such as spin transfer torque. [0003] Magnetic skyrmions are mostly found in chiral materials with noncentrosymmetric structures, such as metal helical magnet...

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Problems solved by technology

However, the Curie temperature of this kind of material is low (skyrmions appear near and below the Curie temperature) and the magnetic skyrmion phase temperature region is narrow (the skyrmions in the bulk generally only exist in the Curie temperatures in the range of a few K), thus severely hampering the application of existing magnetic skyrmion materials in magnetic memory devices

In addition, because the Dzyaloshinskii-Moriya interaction restricts the degrees of freedom of the skyrmion helix and vortex, this makes the skyrmion only have a single topology, which limits the diversification of the skyrmion topology.

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