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Composite material with tremendous electromagnetic coupling effect and its application

A magnetoelectric coupling effect and composite material technology, applied in the direction of layered products, chemical instruments and methods, metal layered products, etc., can solve the problems of low magnetoelectric effect and failure to achieve the ideal coupling of composite two phases

Inactive Publication Date: 2005-06-29
NANJING UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the magnetoelectric effect measured by the experiment is still lower than the theoretical prediction, indicating that the experimental system has not achieved the ideal coupling of the composite two phases considered in theory.

Method used

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  • Composite material with tremendous electromagnetic coupling effect and its application
  • Composite material with tremendous electromagnetic coupling effect and its application
  • Composite material with tremendous electromagnetic coupling effect and its application

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Experimental program
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Embodiment Construction

[0017] Such as figure 1 , 2 As shown, the object of our research is a composite material, which is a 2-2 type composite structure of interlayer coupling composed of piezoelectric material PZT and magnetostrictive Ni-based material. Through the "product effect" of the piezoelectric effect and the magnetostrictive effect under the synergy of the phase interface, the coupling of magnetism-force and force-electricity is realized, thereby realizing the magnetoelectric coupling effect. The process can be visualized as

[0018] Magnetoelectric = electrical mechanical × mechanical magnetic ,

[0019] Thereby we can obtain the important characterization parameter of magnetoelectric coupling effect, namely the magnetoelectric coupling coefficient,

[0020] α E = ( dE ...

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Abstract

A new type of composite material with a huge magnetoelectric coupling effect. The Ni-based alloy and the piezoelectric material are made into a layered composite material. The Ni-based alloy can be a binary alloy of NiMn, NiFe, NiCo, and NiTi, or a ternary alloy of the above alloys , such as NiFeGa, NiTiHf, NiMnGa, NiFeO, NiCoO, NiTiPd, etc.; piezoelectric materials can be PZT, PMN-PT, LiNbO3, etc. with large piezoelectric coefficients. The invention adopts a novel composite material with magnetoelectric effect, and utilizes some temperature-related effects in Ni base alloy to obtain unexpected large magnetoelectric coupling effect. Thus, materials with temperature-dependent magnetoelectric coupling effects can be designed.

Description

1. Technical Field [0001] The present invention is a new type of composite material with giant (large) magnetoelectric coupling effect and its design method and application. Especially the materials and design methods of piezoelectric / magnetostrictive (piezomagnetic) coupling mechanism. 2. Background technology [0002] The magnetoelectric coupling effect mainly describes the response of the electric dipole moment (electric polarization) in a solid to the external magnetic field or the response of the magnetic moment to the external electric field. Generally speaking, it includes the ferroelectric and ferromagnetic coupling effect in the ferroelectric-magnetic composite structure. This allows us to imagine applications such as data storage through magnetic field control electric polarization or electric field control magnetism, which is a function not possessed by dielectrics and magnetic materials themselves. There are many different mechanisms to produce the magnetoelectric eff...

Claims

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Application Information

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IPC IPC(8): B32B15/01
Inventor 朱劲松戴玉蓉赵可包鹏张志方万建国吕笑梅
Owner NANJING UNIV
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