Direct spectroscopic identification of the magnetic structure of the interface of Mn3O4/Fe3O4 superlattices
Direct spectroscopic identification of the magnetic structure of the interface of Mn3O4/Fe3O4 superlattices
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DOI：
10.1016/j.jallcom.2014.06.074
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发表时间：
2014-11-25
影响因子：
6.2
通讯作者：
Fujimori, A.
中科院分区：
文献类型：
--
作者：
Chen, C. L.;Dong, C. L.;Fujimori, A.
本研究对一系列不同层厚的Mn3O4/Fe3O4超晶格进行了铁和锰的L-2、L三边X射线吸收谱和X射线磁性圆二色谱研究，以研究界面对超晶格磁性能的影响。XAS和XMCD谱分析表明，在Mn3O4/Fe3O4超晶格中，具有亚铁磁性的Fe3O4和Mn3O4层之间存在反平行的层间磁耦合。结果表明，超晶格中Mn3O4和Fe3O4层之间的层间磁耦合受界面区磁性的影响。当Fe_3O_4层厚度较高时，超晶格的磁响应主要由Fe_3O_4主导，而随着厚度的减小，超晶格的磁响应以界面为主。研究结果揭示了界面的形成，该界面可能由MnFe2O4组成。界面对Mn3O4/Fe3O4超晶格的磁性能有重要影响。(C)2014爱思唯尔B.V.保留所有权利。
In this study, Fe and Mn L-2,L-3-edge X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) are performed on a series of Mn3O4/Fe3O4 superlattices with various layer thicknesses to investigate the effect of the interface on the magnetic properties of the superlattices. XAS and XMCD spectral analyses indicate the presence of antiparallel interlayer magnetic coupling between the layers of Fe3O4 and Mn3O4, which are both ferrimagnetic, in the Mn3O4/Fe3O4 superlattices. Results suggest that interlayer magnetic coupling between the Mn3O4 and Fe3O4 layers in the superlattice is affected by the magnetic property of the interface region. The magnetic response of the superlattices is dominated by Fe3O4 at high Fe3O4 layer thicknesses and by the interface as the thickness declines. Findings reveal the formation of an interface that is likely composed of MnFe2O4. The interface critically influences the magnetic properties of the Mn3O4/Fe3O4 superlattices. (C) 2014 Elsevier B.V. All rights reserved.