中国物理B ›› 2014, Vol. 23 ›› Issue (10): 107502-107502.doi: 10.1088/1674-1056/23/10/107502
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
芮文彬a, 何茂诚a, 游彪a, 时钟b, 周仕明b, 肖明文a, 高远a, 张维a, 孙力c, 杜军a
Rui Wen-Bin (芮文彬)a, He Mao-Cheng (何茂诚)a, You Biao (游彪)a, Shi Zhong (时钟)b, Zhou Shi-Ming (周仕明)b, Xiao Ming-Wen (肖明文)a, Gao Yuan (高远)a, Zhang Wei (张维)a, Sun Li (孙力)c, Du Jun (杜军)a
摘要: A significant exchange bias (EB) training effect has been observed in sputter deposited FeAu/FeNi bilayers, wherein the exchange field (HE) exhibits a special sign-changeable temperature dependence. Very interestingly, despite the absence of multiple easy axes in the FeAu spin glass (SG) layer, HE drops abruptly between the first and second magnetic cycles, which is followed by a more gradual continuous change in the subsequent cycles. This training behavior cannot be described by the empirical n-1/2 law because of the asymmetric magnetization reversal processes. We propose modifying Binek's model to include the asymmetric changes of the pinning SG spins at the descending and ascending branches. This new model successfully describes the EB training effect in FeAu/FeNi bilayers.
中图分类号: (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))