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Multi-ferric composite material based on giant magneto-caloric La-Fe-Co-Si, and preparation method and application thereof

A technology of la-fe-co-si and composite materials, applied in the direction of magnetic materials, inductor/transformer/magnet manufacturing, inorganic material magnetism, etc., can solve the problems of long annealing time, high annealing temperature, etc., and achieve the goal of shortening the annealing time Effect

Active Publication Date: 2018-09-07
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the 1:13 phase is a metastable phase, the formation of the 1:13 phase often requires a high annealing temperature and a long annealing time (needs one month)

Method used

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  • Multi-ferric composite material based on giant magneto-caloric La-Fe-Co-Si, and preparation method and application thereof
  • Multi-ferric composite material based on giant magneto-caloric La-Fe-Co-Si, and preparation method and application thereof
  • Multi-ferric composite material based on giant magneto-caloric La-Fe-Co-Si, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The structure of the multiferroic composite material of the present embodiment is: La-Fe-Co-Si / Au / PMN-PT(011) / Au, and La-Fe-Co-Si is composed of: La(Fe 1-x co x ) 13-y Si y , where x=0.06, y=1.2, the flakes are obtained by thinning, with a thickness of 100 μm; annealed at 1100°C for 1 month, and quenched with liquid nitrogen; the top electrode is Au, the thickness is 200nm; the bottom electrode is Au, the thickness is 200nm.

Embodiment 2

[0055] This example is carried out in the same manner as Example 1, except that the thickness of the La-Fe-Co-Si flake is 50 μm, the thickness of the top electrode is 100 nm, and the thickness of the bottom electrode is 500 nm.

Embodiment 3

[0057] This example is carried out in the same manner as Example 1, except that the thickness of the La-Fe-Co-Si sheet is 22 μm, the thickness of the top electrode is 20 nm, and the thickness of the bottom electrode is 1 μm.

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Abstract

The invention provides a multi-ferric composite material having both magnetic refrigeration effect, electrically-controlled magnetic effect and magnetic memory effect nearby the room temperature, anda preparation method and application thereof. The multi-ferric composite material comprises a ferroelectric PMN-PT monocrystalline substrate, and a La-Fe-Co-Si ferromagnetic alloy layer with giant magneto-caloric effect, wherein metal electrodes are evaporated on two surfaces of the PMN-PT monocrystalline substrate, and two surfaces are adhered with the La-Fe-Co-Si ferromagnetic alloy layer through adhesive so as to form the multi-ferric composite material. The advantage of the multi-ferric composite material is that the considerable electrically controlled magnetic effect is provided nearby the room temperature, and the magnetic memory effect induced by the pulse voltage is represented. And meanwhile, since the ferromagnetic layer of the structure has giant magneto-caloric effect, a new model for overcoming the heating of the storage unit by using the magnetic refrigeration is provided. The multi-ferric composite material provided by the invention has important and actual significancefor developing a novel multifunctional composite device having both the magnetic refrigeration effect and the magnetic memory effect.

Description

technical field [0001] The present invention relates to a kind of by giant magnetocaloric La-Fe-Co-Si material and relaxation property ferroelectric substrate (1-x)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -xPbTiO 3 A multiferroic composite material with magnetic memory effect composed of (PMN-PT) and its preparation method and application. Background technique [0002] Multiferroic materials refer to material systems in which two or more ordered phases (ferromagnetic, ferroelectric, ferroelastic) coexist. Magnetoelectric coupling or inverse magnetoelectric coupling effects can be realized in this type of material system, that is, the application of a magnetic field causes the change of the electrical polarization state of the substance or the application of an electric field causes the change of the magnetization state of the substance. [0003] The development of the field of information storage technology has higher and higher requirements for the improvement of storage density and spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/01H01F41/00C22C38/02C22C38/10C22C33/04C23C14/32C23C14/16
CPCC22C33/04C22C38/005C22C38/02C22C38/10C23C14/16C23C14/32H01F1/01H01F1/012H01F1/015H01F41/00
Inventor 刘瑶胡凤霞乔凯明梁飞翔王晶孙继荣沈保根
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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