张应力对铁磁/反铁磁体系交换偏置的影响

白宇浩 云国宏 那日苏

白宇浩, 云国宏, 那日苏. 张应力对铁磁/反铁磁体系交换偏置的影响[J]. 高压物理学报, 2009, 23(4): 252-260 . doi: 10.11858/gywlxb.2009.04.003
引用本文: 白宇浩, 云国宏, 那日苏. 张应力对铁磁/反铁磁体系交换偏置的影响[J]. 高压物理学报, 2009, 23(4): 252-260 . doi: 10.11858/gywlxb.2009.04.003
BAI Yu-Hao, YUN Guo-Hong, Narisu. Effect of Tensile Stress on Exchange Bias in Ferromagnetic/Antiferromagnetic Bilayers[J]. Chinese Journal of High Pressure Physics, 2009, 23(4): 252-260 . doi: 10.11858/gywlxb.2009.04.003
Citation: BAI Yu-Hao, YUN Guo-Hong, Narisu. Effect of Tensile Stress on Exchange Bias in Ferromagnetic/Antiferromagnetic Bilayers[J]. Chinese Journal of High Pressure Physics, 2009, 23(4): 252-260 . doi: 10.11858/gywlxb.2009.04.003

张应力对铁磁/反铁磁体系交换偏置的影响

doi: 10.11858/gywlxb.2009.04.003
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    通讯作者:

    云国宏

Effect of Tensile Stress on Exchange Bias in Ferromagnetic/Antiferromagnetic Bilayers

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    Corresponding author: YUN Guo-Hong
  • 摘要: 采用能量极小原理及Stoner-Wohlfarth模型,研究了张应力对铁磁/反铁磁双层薄膜交换偏置的影响。在不施加外磁场时,根据体系能量与铁磁层磁化强度方向之间的关系,得到了内禀易轴与内禀难轴的位置。交换各向异性与单轴各向异性之间的竞争使体系存在单稳态与双稳态两种不同的状态,直接决定了交换偏置的角度依赖关系。分析磁化过程发现,外磁场在沿内禀易轴及内禀难轴方向施加时,磁滞回线的一支转换场发生突变,另一支转换场保持不变,最终导致交换偏置场和矫顽场出现阶跃行为。在阶跃点处,体系具有较大的交换偏置场和矫顽场。数值计算表明:张应力的大小与方向对交换偏置均有很大的影响,均可以使体系在单稳态与双稳态之间相互转变并导致角度依赖关系发生显著变化。研究表明,应力可作为一种可行的方法来控制和调节铁磁/反铁磁体系的交换偏置。

     

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出版历程
  • 收稿日期:  2008-11-16
  • 修回日期:  2009-02-24
  • 发布日期:  2009-08-15

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