外延Co/NiO/Fe三层膜中磁各向异性的转移

Transfer of magnetic anisotropy in epitaxial Co/NiO/Fe trilayers.

作者信息

Szpytma M, Ślęzak M, Janus W, Nayyef H, Ślęzak T, Mandziak A, Zając M, Wilgocka-Ślęzak D, Menteş T O, Jugovac M, Locatelli A, Kozioł-Rachwał A

机构信息

Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland.

National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Krakow, Poland.

出版信息

Sci Rep. 2024 Jan 19;14(1):1680. doi: 10.1038/s41598-024-51896-w.

DOI:10.1038/s41598-024-51896-w

PMID:38243038

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10798992/

Abstract

The magnetic properties of Co(10 Å)/NiO(40 Å)/Fe trilayer epitaxially grown on W(110) substrate were investigated with use of x-ray magnetic linear dichroism (XMLD) and x-ray magnetic circular dichroism (XMCD). We showed that magnetic anisotropy of Fe film that can be controlled by a thickness-driven spin reorientation transition is transferred via interfacial exchange coupling not only to NiO layer but further to ferromagnetic Co overlayer as well. Similarly, a temperature driven spin reorientation of Fe sublayer induces a reorientation of NiO spin orientation and simultaneous switching of the Co magnetization direction. Finally, by element specific XMCD and XMLD magnetic hysteresis loop measurements we proved that external magnetic field driven reorientation of Fe and Co magnetizations as well as NiO Néel vector are strictly correlated and magnetic anisotropy fields of Fe and Co sublayers are identical despite the different crystal structures.

摘要

利用X射线磁线性二色性（XMLD）和X射线磁圆二色性（XMCD）研究了在W(110)衬底上外延生长的Co(10 Å)/NiO(40 Å)/Fe三层膜的磁性。我们表明，可通过厚度驱动的自旋重取向转变来控制的Fe膜的磁各向异性，不仅通过界面交换耦合传递到NiO层，还进一步传递到铁磁Co覆盖层。同样，Fe子层的温度驱动自旋重取向会引起NiO自旋取向的重取向以及Co磁化方向的同时切换。最后，通过元素特异性XMCD和XMLD磁滞回线测量，我们证明了外部磁场驱动的Fe和Co磁化重取向以及NiO奈尔矢量是严格相关的，并且尽管晶体结构不同，但Fe和Co子层的磁各向异性场是相同的。