摘要
利用一定边界条件下的Maxwell方程和修正的Landau_Lifshitz_Gilbert方程,对磁性层/非磁性层/磁性层(M/C/M)三明治多层膜中出现的巨磁阻抗效应进行了理论分析.对于单轴横向磁各向异性三明治膜,在考虑了各向异性场的交变部分的基础上,得到了阻抗与频率、外磁场、各向异性场、电导率、厚度等因素之间的关系.着重讨论了,磁性层和非磁性层薄膜厚度的优化问题.当GMI效应达到峰值时,非磁性层在薄膜总厚度中所占的比例与各向异性场Ha的大小、薄膜的总厚度以及非磁性层与磁性层电导率σ1/σ2比值有关.为实验上设计三明治模型提供了一个数值参考.
The sandwiched film structured by two soft magnetic layers with a conductive layer as the central one is proposed. Giant magneto-impedance effect in sandwich film with a uniaxial anisotropy is investigated theoretically according to Maxwell equations and modifield Landau-Lifshitz-Gilbert equation. Calculating the alternating anisotropy of the magnetic layers, we presents the dependence of △Z/Z on the external magnetic field, frequency, anisotropy field and thickness. The thickness of the nonmagnetic and magnetic layers depending on the anisotropy field layer thickness, and conductivity σ1/σ2 in the ease of the maximum GMI effect. It offered reference for designing sandwich films in experiment.
出处
《首都师范大学学报（自然科学版）》
2006年第4期16-21,共6页
Journal of Capital Normal University：Natural Science Edition
