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应力各向异性对铁磁/反铁磁双层薄膜磁性质的影响

DOI: 10.11858/gywlxb.2006.03.007, PP. 265-269

Keywords: 铁磁共振,铁磁/反铁磁双层膜,单轴各向异性,交换各向异性,应力各向异性

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Abstract:

采用铁磁共振方法,研究了交换各向异性和应力各向异性对铁磁/反铁磁双层薄膜性质的影响。结果表明:界面交换作用导致单向各向异性,应力各向异性对材料的磁化难易程度有较大影响。在外磁场方向接近应力场方向时,共振频率向高值方向移动,其它区域共振频率则向低值方向移动。对频率线宽而言,接近应力场方向,频率线宽加宽,其它区域频率线宽则变窄。此外,当磁场变化时,应力的存在使得共振频率向低值方向移动,尤其在β=π方向情况较为复杂,在弱场范围出现了两个区域:即在某磁场范围内,共振频率向高值方向移动,且频率线宽加宽;而其它范围的共振频率(线宽)是向高值方向移动(加宽)还是向低值方向移动(变窄),取决于外磁场的相对强弱。

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