Abstract BiFeO 3 /L1 0 CoPt layered films are prepared by sputtering on MgO (0 0 1) substrates. Both X-ray diffraction and transmission electron microscopy confirm the (0 0 1)-epitaxial growth. Magnetic field-mediated two magnetic states phenomenon has been observed in this layered films. Element mapping results indicate there exist Co-deficient CoPt layer (∼1.5 nm) and Co-containing BiFeO 3 layer (∼2 nm) adjacent to the BiFeO 3 /CoPt interface. After applying in-plane or out-of-plane external magnetic field, moments in the above layers react differently, leading to two disparate magnetic states: coupling and decoupling states.

中文翻译：

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BiFeO 3 /CoPt 层状结构中磁场介导的两种磁态

摘要 通过在MgO (0 0 1) 衬底上溅射制备BiFeO 3 /L1 0 CoPt 层状薄膜。X 射线衍射和透射电子显微镜均证实了 (0 0 1)-外延生长。在这种层状薄膜中观察到磁场介导的两种磁态现象。元素映射结果表明与BiFeO 3 /CoPt 界面相邻的CoPt 层（~1.5 nm）和含Co 的BiFeO 3 层（~2 nm）存在。在施加面内或面外外部磁场后，上述层中的磁矩反应不同，导致两种不同的磁态：耦合态和解耦态。