Complex-phase multiferroic material with non-volatile magnetothermal effect regulated and controlled by electric field as well as preparation method and application of complex-phase multiferroic material

A magneto-caloric effect and electric field control technology, applied in the manufacture/processing of electromagnetic devices, material selection, etc., can solve the problems of high equipment requirements, volatile magneto-caloric effect, unfavorable practical application, etc., and achieve the expansion of refrigeration working temperature range , wide effective cooling temperature zone and broad application prospects

Pending Publication Date: 2019-05-10
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect that the magneto-caloric effect of the composite material controlled by the electric field in the prior art is volatile, which is not conducive to practica

Method used

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  • Complex-phase multiferroic material with non-volatile magnetothermal effect regulated and controlled by electric field as well as preparation method and application of complex-phase multiferroic material
  • Complex-phase multiferroic material with non-volatile magnetothermal effect regulated and controlled by electric field as well as preparation method and application of complex-phase multiferroic material
  • Complex-phase multiferroic material with non-volatile magnetothermal effect regulated and controlled by electric field as well as preparation method and application of complex-phase multiferroic material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A kind of multiphase multiferroic material with non-volatile electric field regulation magnetocaloric effect, described multiphase multiferroic material is pasted by a Ni-Co-Mn-Sn alloy thin strip on the upper and lower surfaces coated with a layer of gold film PMN-PT single crystal substrate composition, its preparation method comprises the following steps:

[0043] 1) Preparation of thin metal strips: high-purity Ni, Mn, Co, Sn metal raw materials are prepared into Ni 43 co 7 mn 39 sn 11 The Ni-Co-Mn-Sn alloy thin strip; wherein the rotation speed of the molybdenum wheel in the preparation process of the alloy thin strip is 10 m / s, and the length of the thin strip thrown out is 2 cm, and the thickness is 20 μm; the rapid quenching The steps are as follows: seal the prepared Ni-Co-Mn-Sn alloy thin strip in a vacuum quartz tube, anneal at 800°C for 5 minutes, and then rapidly quench in ice water.

[0044] (2) Substrate surface coating: a layer of gold film with a th...

Embodiment 2

[0048] A kind of multiphase multiferroic material with non-volatile electric field regulation magnetocaloric effect, described multiphase multiferroic material is pasted by a Ni-Co-Mn-Sn alloy thin strip on the upper and lower surfaces coated with a layer of gold film PMN-PT single crystal substrate composition, its preparation method comprises the following steps:

[0049] Preparation of thin metal strips: high-purity Ni, Mn, Co, Sn metal raw materials are prepared into Ni 43 co 7 mn 39 sn 11 The Ni-Co-Mn-Sn alloy strip; wherein the rotation speed of the molybdenum wheel in the preparation process of the alloy strip is 30 m / s, and the length of the thin strip thrown out is 3 cm, and the thickness is 30 μm; the rapid quenching The steps are as follows: seal the prepared Ni-Co-Mn-Sn alloy thin strip in a vacuum quartz tube, anneal at 950°C for 15 minutes, and then rapidly quench in ice water.

[0050] (2) Substrate surface coating: A gold film with a thickness of 180 nm was...

Embodiment 3

[0054] A kind of multiphase multiferroic material with non-volatile electric field regulation magnetocaloric effect, described multiphase multiferroic material is pasted by a Ni-Co-Mn-Sn alloy thin strip on the upper and lower surfaces coated with a layer of gold film PMN-PT single crystal substrate composition, its preparation method comprises the following steps:

[0055] (1) Preparation of thin metal strips: high-purity Ni, Mn, Co, Sn metal raw materials are prepared by arc melting and melt rapid quenching into Ni 43 co 7 mn 39 sn 11 Ni-Co-Mn-Sn alloy thin strip; Wherein the rotating speed of molybdenum wheel is 20 m / s in the preparation process of alloy thin strip, the thin strip length that throws out is 3 cm, and thickness is 20 μm; Described quick quenching step The method is as follows: the prepared Ni-Co-Mn-Sn alloy thin strip is sealed in a vacuum quartz tube, annealed at 850° C. for 10 minutes, and then rapidly quenched in ice water.

[0056] (2) Coating on the ...

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Abstract

The invention relates to the field of magnetic refrigeration materials, in particular to a complex-phase multiferroic material with a non-volatile magnetothermal effect regulated and controlled by anelectric field as well as a preparation method and an application of the complex-phase multiferroic material, wherein the complex-phase multiferroic material is formed by gluing a piece of Ni-Co-Mn-Snalloy thin strip on a PMN-PT monocrystal substrate, wherein the upper and lower surfaces of the monocrystal substrate are plated with a layer of gold thin films. The situations that the magnetothermal effect regulated and controlled through the electric field of the composite material in the prior art is volatile, practical application is not facilitated, and the requirement on instrument equipment is relatively high are overcome; in the invention, an external electric field is applied to the thickness direction of the PMN-PT monocrystal substrate of the Ni-Co-Mn-Sn/(011) PMN-PT complex-phasemultiferroic material, and non-volatile residual strain can be generated in the in-plane [01-1] direction in an induced manner; and by virtue of the residual strain output by the PMN-PT substrate, non-volatile regulation and control of the electric field to the magnetothermal effect is realized; and therefore the refrigeration working temperature area is expanded, and the application prospect inthe field of magnetic refrigeration is wider.

Description

technical field [0001] The invention relates to the field of magnetic refrigeration materials, in particular to a multiphase multiferroic material with a nonvolatile electric field regulating magnetocaloric effect, a preparation method and application thereof. Background technique [0002] Magnetic refrigeration is a new refrigeration method produced by the magnetocaloric effect of magnetic materials. Compared with the traditional gas compression refrigeration method, it has significant advantages such as high refrigeration efficiency and environmental friendliness, and has been highly valued by researchers from various countries. The basic principle is to use the magneto-caloric effect (also known as the magnetic card effect) of the magnetic refrigeration material to change the temperature of the surrounding environment. That is to say, when the magnetic refrigeration material enters into the magnetic field and is magnetized in an isothermal environment, its disordered mag...

Claims

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Application Information

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IPC IPC(8): H01L43/10H01L43/12
Inventor 温嘉红王敦辉赵晓宇
Owner HANGZHOU DIANZI UNIV
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