Micromagnetics of GMR multilayer sensors at high current densities
Micromagnetics of GMR multilayer sensors at high current densities
复制标题
高电流密度下 GMR 多层传感器的微磁学
DOI：
10.1109/20.333914
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
N. Smith
中科院分区：
文献类型：
--
作者：
N. Smith
理论上考虑了内部感应电流场对跨 2N-1 中间非磁性传导层交换耦合的 2N 磁性层的理想化 GMR 多层带的二维微磁学的影响。包括反铁磁和双二次层间交换耦合项。分析地近似了由感测电流自场引起的磁化分布。在可变电流密度 J 下数值生成的外场传输曲线与使用 NiFeCo-Cu 测试装置进行的实验进行了很好的比较。研究了由于高 J、低交换耦合 GMR 多层器件中的自偏置效应导致的磁头性能损失，这可能是未来高密度 MR 再现磁头的特征。 >
The effect of internal sense current fields on the 2-D micromagnetics of an idealized GMR multilayer stripe of 2N magnetic layers exchange coupled across 2N-1 intermediate nonmagnetic conduction layers is considered theoretically. Both antiferromagnetic and biquadratic interlayer exchange coupling terms are included. The magnetization distribution due to sense current self-fields is approximated analytically. Numerically generated external field transfer curves at variable current density, J, compare well to experiments with test devices of NiFeCo-Cu. Loss in head performance due to self-bias effects in high J, low exchange-coupled GMR multilayer devices, a likely characteristic of future high density MR reproduce heads, is examined. >