Influence of Au capping layer on the magnetic properties of ultrathin epitaxial Fe3O4/GaAs(001) film
Influence of Au capping layer on the magnetic properties of ultrathin epitaxial Fe3O4/GaAs(001) film
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DOI：
10.1063/1.3556956
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发表时间：
2011-04
影响因子：
3.2
通讯作者：
E. Liu;Jiayu Zhang;Wen Zhang;P. Wong;L. Lv;Y. Zhai;Jing Wu;Yongbing Xu;H. Zhai
中科院分区：
文献类型：
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作者：
E. Liu;Jiayu Zhang;Wen Zhang;P. Wong;L. Lv;Y. Zhai;Jing Wu;Yongbing Xu;H. Zhai
利用MO Kerr效应、超导量子干涉器件和铁磁共振技术，研究了Au封盖层对GaAs（100）衬底上超薄外延Fe3O4薄膜磁各向异性和分子磁矩的影响。有盖层和没有盖层的薄膜表现出主要的平面内单轴磁各向异性和较小的四向各向异性。研究发现，Au封盖层显著增加了Au/Fe3O4界面磁弹性相互作用的单轴磁各向异性，并且由于Au层与Fe3O4层之间的界面扩散而意外降低了饱和分子磁化强度。
The effect of the Au capping layer on the magnetic anisotropies and molecular magnetic moment of ultrathin epitaxial Fe3O4 films on GaAs(100) substrate was studied by MO Kerr effect, superconducting quantum interference device, and Ferromagnetic resonance, respectively. The films with and without capping layers show a predominant in-plane uniaxial magnetic anisotropy and a minor fourfold anisotropy. The Au capping layer was found to increase significantly the uniaxial magnetic anisotropy related to the magnetoelastic interactions at the Au/Fe3O4 interface, and unexpectedly reduce saturation molecular magnetization due to the interfacial diffusion between Au layer and Fe3O4 layer.