Epitaxial Fe16N2 thin film on nonmagnetic seed layer

被引：12

作者：

Hang, Xudong ^{[1
]}

Zhang, Xiaowei ^{[2
]}

Ma, Bin ^{[2
]}

Lauter, Valeria ^{[3
]}

Wang, Jian-Ping ^{[2
]}

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

[2] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

[3] Oak Ridge Natl Lab, Neutron Sci Directorate, Oak Ridge, TN 37830 USA

来源：

APPLIED PHYSICS LETTERS | 2018年 / 112卷 / 19期

关键词：

NITROGEN-ION-IMPLANTATION; SINGLE-CRYSTAL FILMS; MAGNETIC-ANISOTROPY; FE-N; ALPHA-FE16N2; MOMENT;

D O I：

10.1063/1.5028396

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Metastable alpha ''-Fe16N2 has attracted much interest as a candidate for rare-earth-free hard magnetic materials. We demonstrate that Fe16N2 thin films were grown epitaxially on Cr seed layers with MgO (001) substrates by facing-target sputtering. Good crystallinity with the epitaxial relation MgO (001)[110] parallel to Cr (001)[100] parallel to Fe16N2 (001)[100] was obtained. The chemical order parameter, which quantifies the degree of N ordering in the Fe16N2 (the N-disordered phase is alpha'-Fe8N martensite), reaches 0.75 for Cr-seeded samples. Cr has a perfect lattice constant match with Fe16N2, and no noticeable strain can be assigned to Fe16N2. The intrinsic saturation magnetization of this non-strained Fe16N2 thin film at room temperature is determined to be 2.31 T by polarized neutron reflectometry and confirmed with vibrating sample magnetometry. Our work provides a platform to directly study the magnetic properties of high purity Fe16N2 films with a high order parameter. Published by AIP Publishing.

引用

页数：5

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