Magnetic properties of sputter-deposited FeO/Cr multilayers followed by annealing in vacuum were investigated. The saturation magnetization and perpendicular magnetic anisotropy were enhanced by post-annealing and the maximum perpendicular anisotropy of 3.3 Merg/cm was obtained in this study. From the results of X-ray photoelectron spectroscopy and X-ray diffraction, it was found that metallic Fe layers were formed in FeO layers due to the migration of oxygen atoms from FeO to Cr layer proceeded by the post-annealing. The large perpendicular anisotropy was considered to arise from the interface between Fe and Fe-oxide layers.

中文翻译：

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Fe3O4/Cr 交替溅射和后退火制备的多层膜中的垂直磁各向异性

研究了真空退火后溅射沉积 FeO/Cr 多层膜的磁性。通过后退火增强了饱和磁化强度和垂直磁各向异性，并且在本研究中获得了3.3 Merg/cm的最大垂直各向异性。根据X射线光电子能谱和X射线衍射的结果发现，由于后退火过程中氧原子从FeO迁移到Cr层，所以在FeO层中形成了金属Fe层。大的垂直各向异性被认为是由 Fe 和 Fe 氧化物层之间的界面产生的。