（Fe）/NiO/MgO/Cr/MgO（001）外延多层膜中反铁磁 NiO 的可调磁各向异性。

Tunable magnetic anisotropy of antiferromagnetic NiO in (Fe)/NiO/MgO/Cr/MgO(001) epitaxial multilayers.

机构信息

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

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

出版信息

Sci Rep. 2023 Mar 24;13(1):4824. doi: 10.1038/s41598-023-31930-z.

DOI:10.1038/s41598-023-31930-z

PMID:36964276

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10039026/

Abstract

We report on the magnetic properties of antiferromagnetic NiO(001) thin films in epitaxially grown NiO/MgO(d)/Cr/MgO(001) system for different thicknesses of MgO, d. Results of X-ray Magnetic Linear Dichroism show that together with an increase of d, rotation of NiO spins from in-plane towards out-of-plane direction occurs. Furthermore, we investigated how the proximity of Fe modifies the magnetic state of NiO in Fe/NiO/MgO(d)/Cr/MgO(001). We proved the existence of a multidomain state in NiO as a result of competition between the ferromagnet/antiferromagnet exchange coupling and strain exerted on the NiO by the MgO buffer layer.

摘要

我们报告了在不同 MgO 厚度 d 的外延生长 NiO/MgO(d)/Cr/MgO(001) 体系中，反铁磁 NiO(001) 薄膜的磁性质。X 射线磁线性二色性的结果表明，随着 d 的增加，NiO 自旋从面内方向旋转到面外方向。此外，我们研究了 Fe 的近邻如何改变 Fe/NiO/MgO(d)/Cr/MgO(001) 中 NiO 的磁状态。我们证明了 NiO 中存在多畴状态，这是由于铁磁/反铁磁交换耦合和 MgO 缓冲层对 NiO 施加的应变之间的竞争。