带材非对称巨磁阻抗效应的建模及数值计算

华南理工大学学报（自然科学版） ›› 2009, Vol. 37 ›› Issue (2): 35-39,44.

带材非对称巨磁阻抗效应的建模及数值计算

柴秀丽¹曾德长¹刘桂雄²余红雅¹ 钟喜春¹刘文洁¹

1. 华南理工大学材料科学与工程学院, 广东广州 510640; 2. 华南理工大学机械与汽车工程学院, 广东广州 510640

收稿日期:2008-01-10 修回日期:2008-08-08 出版日期:2009-02-25 发布日期:2009-02-25
通信作者: 曾德长（1963-），男，教授，博士生导师，主要从事磁性材料与器件、材料表面科学与工程研究．E—mail：medczeng@scut．edu．cn E-mail:chaixiuli@sohu．com
作者简介:柴秀丽（1980-），女，讲师，博士，现任职于河南大学计算机与信息工程学院，主要从事新型智能传感器研究．
基金资助:
国家自然科学基金资助项目（U0734001,50874050）;广东省科技计划项目（2004810301009,2006A11002001,20078010600007,20078010600043）;广东省自然科学基金资助项目（05300306）;广州市科技计划项目（200523-D2061,200622-130131,200622一D0121）

Modeling and Numerical Calculation of Asymmetrical Giant Magneto-Impedance Effect of Ribbons

Chai Xiu-li¹ Zeng De-chang¹ Liu Gui-xiong² Yu Hong-ya¹ Zhong Xi-chun¹ Liu Wen-jie¹

1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China

Received:2008-01-10 Revised:2008-08-08 Online:2009-02-25 Published:2009-02-25
Contact: 曾德长（1963-），男，教授，博士生导师，主要从事磁性材料与器件、材料表面科学与工程研究．E—mail：medczeng@scut．edu．cn E-mail:chaixiuli@sohu．com
About author:柴秀丽（1980-），女，讲师，博士，现任职于河南大学计算机与信息工程学院，主要从事新型智能传感器研究．
Supported by:
国家自然科学基金资助项目（U0734001,50874050）;广东省科技计划项目（2004810301009,2006A11002001,20078010600007,20078010600043）;广东省自然科学基金资助项目（05300306）;广州市科技计划项目（200523-D2061,200622-130131,200622一D0121）

摘要/Abstract

摘要： 非对称巨磁阻抗效应具有高灵敏度的磁场响应．对于具有内部非晶软磁层和表面结晶层的带材，其非对称巨磁阻抗效应的传感建模是个复杂问题．文中针对这一问题，采用有效偏置场描述表层和内层之间的耦合作用，通过求解Landau．Lifshitz动力学方程和线性Maxwell方程得到器件的对角和非对角电压，并计算结晶层厚度变化时的磁场特性正反向工作区间和灵敏度．计算结果与实验基本相符，表明所建模型是可靠有效的．

关键词: 非对称巨磁阻抗效应, 对角电压, 非对角电压, Landau—Lifshitz动力学方程, 传感建模

Abstract:

Although the asymmetric giant magneto-impedance effect （AGMIE） is of high-sensitivity magnetic re- sponse, its sensing modeling in a ribbon with inner amorphous and outer crystalline layers still remains a complicated issue. To solve the problem, this paper establishes a model of AGMIE. In this model, the coupling between the crystalline and amorphous layers is described using the effective bias field, the diagonal and off-diagonal voltages are calculated by simultaneously solving Landau-Lifshitz kinetic equations and linear Maxwell equations, and the positive and negative working spaces of the magnetic field as well as the sensitivity of the sensor at various crystal- line layer thicknesses are thus deduced. The calculated results basically accord with the experimental ones, indica- ting that the proposed model is credible and effective.

Key words: asymmetrical giant magneto-impedance effect, diagonal voltage, off-diagonal voltage, Landau-Lifshitz kinetic equation, sensing modeling

柴秀丽曾德长刘桂雄余红雅钟喜春刘文洁 . 带材非对称巨磁阻抗效应的建模及数值计算[J]. 华南理工大学学报（自然科学版）, 2009, 37(2): 35-39,44.

Chai Xiu-li Zeng De-chang Liu Gui-xiong Yu Hong-ya Zhong Xi-chun Liu Wen-jie . Modeling and Numerical Calculation of Asymmetrical Giant Magneto-Impedance Effect of Ribbons[J]. Journal of South China University of Technology (Natural Science Edition), 2009, 37(2): 35-39,44.