Liu Yaohua, Ke Xianglin
Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
J Phys Condens Matter. 2015 Sep 23;27(37):373003. doi: 10.1088/0953-8984/27/37/373003. Epub 2015 Sep 2.
Magnetic complex-oxide heterostructures are of keen interest because a wealth of phenomena at the interface of dissimilar materials can give rise to fundamentally new physics and potentially valuable functionalities. Altered magnetization, novel magnetic coupling and emergent interfacial magnetism at the epitaxial layered-oxide interfaces are under intensive investigation, which shapes our understanding on how to utilize those materials, particularly for spintronics. Neutron and x-ray based techniques have played a decisive role in characterizing interfacial magnetic structures and clarifying the underlying physics in this rapidly developing field. Here we review some recent experimental results, with an emphasis on those studied via polarized neutron reflectometery and polarized x-ray absorption spectroscopy. We conclude with some perspectives.
磁性复合氧化物异质结构备受关注，因为不同材料界面处的大量现象能够引发全新的基础物理学以及具有潜在价值的功能特性。外延层状氧化物界面处的磁化改变、新型磁耦合以及新兴的界面磁性正在深入研究之中，这影响着我们对如何利用这些材料的理解，特别是在自旋电子学方面。基于中子和X射线的技术在表征界面磁结构以及阐明这个快速发展领域的基础物理学方面发挥了决定性作用。在此，我们回顾一些近期的实验结果，重点关注通过极化中子反射仪和极化X射线吸收光谱法所研究的结果。最后我们给出一些展望。
