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Ni-Mn based ferromagnetic shape memory alloy/piezoelectric composite and application in magnetoelectric effect thereof

A memory alloy and composite material technology, applied in the field of new complex phase multiferroic materials

Inactive Publication Date: 2011-03-02
NANJING UNIV
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  • Abstract
  • Description
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Problems solved by technology

From the perspective of material selection, in this type of composite materials with better magnetoelectric properties, ferromagnetic alloys contain rare earth materials with higher prices, and most of the piezoelectric bodies are single crystal materials, from preparation to processing have higher costs

Method used

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  • Ni-Mn based ferromagnetic shape memory alloy/piezoelectric composite and application in magnetoelectric effect thereof
  • Ni-Mn based ferromagnetic shape memory alloy/piezoelectric composite and application in magnetoelectric effect thereof
  • Ni-Mn based ferromagnetic shape memory alloy/piezoelectric composite and application in magnetoelectric effect thereof

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Experimental program
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Embodiment Construction

[0019] Description of physical quantities and some parameters:

[0020] Magnetoelectric effect: Including positive magnetoelectric effect and inverse magnetoelectric effect, among them, the positive magnetoelectric effect refers to the electric polarization change of the material under the action of a magnetic field, and the positive magnetoelectric coefficient is used (Unit: V / cm Oe) characterization; and the inverse magnetoelectric effect refers to the change in the magnetic polarization intensity of the material under the action of an electric field, using the inverse magnetoelectric coefficient (Unit: G / V) Characterization.

[0021] DC bias magnetic field (H bias ）： When measuring the magnetoelectric effect, an external DC magnetic field is applied to the sample.

[0022] Alternating magnetic field (H ac ）： When measuring the magnetoelectric effect, the external AC magnetic field applied to the sample is generally a sinusoidal signal ( ).

[0023] Transverse magnetoel...

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PUM

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Abstract

The invention relates to a Ni-Mn based ferromagnetic shape memory alloy / piezoelectric composite and an application in magnetoelectric effect thereof. The composite is a NiMnCoSn / piezoelectric material, wherein the piezoelectric material contains PZT and PMN-PT single crystal. The application of the Ni-Mn based ferromagnetic shape memory alloy / piezoelectric composite in magnetoelectric effect uses the NiMnCoSn / piezoelectric material to form a composite. The application comprises the following steps: a metal electrode is plated on the surface of a piezoelectric material patch; secondly the plate-like ferromagnetic phase NiMnCoSn shape memory alloy is adhered with the piezoelectric material patch to form the composite; under the action of an external magnetic field, the piezoelectric patch in the composite outputs voltage; and the martensite phase transformation of the ferromagnetic phase shape memory alloy is generated under the driving of the external magnetic field, the stress caused by the structural phase transformation is applied on the piezoelectric, and the piezoelectric generates an output voltage through the piezoelectric effect to obtain positive magnetoelectric effect. The application of the negative positive magnetoelectric effect can also be obtained.

Description

technical field [0001] The invention belongs to the shape memory alloy / piezoelectric composite material technology, belongs to the category of material physics, and specifically relates to a new type of multiphase multiferroic material with excellent magnetoelectric properties and wide application prospects, that is, Ni-Mn-based ferromagnetic materials. Shape memory alloy / piezoelectric ceramic layered composites. It is proposed to use the driving effect of temperature, magnetic field and external stress on the martensitic transformation in Ni-Mn-based ferromagnetic shape memory alloy, the characteristics of martensitic transformation and the good (inverse) piezoelectric effect of piezoelectric ceramics, and obtain Excellent magnetoelectric effect (including positive magnetoelectric effect and inverse magnetoelectric effect) in Ni-Mn based ferromagnetic shape memory alloy / piezoelectric ceramic layered composite. Background technique [0002] Magnetoelectric multiferroic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L43/10H01L41/187
Inventor 王敦辉陈水源轩海成都有为
Owner NANJING UNIV
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