Perpendicular magnetic anisotropy in CoxMn4−xN (x = 0 and 0.2) epitaxial films and possibility of tetragonal Mn4N phase
Source abstract
Abstract
We grow 25-nm-thick Mn4N and Co0.2Mn3.8N epitaxial films on SrTiO3(001) by molecular beam epitaxy. These films show the tetragonal structure with a tetragonal axial ratio c/a of approximately 0.99. Their magnetic properties are measured at 300 K, and perpendicular magnetic anisotropy is confirmed in both films. There is a tendency that as the Co composition increases, an anisotropy field increases, whereas saturation magnetization and uniaxial magnetic anisotropy energy decrease. First-principles calculation predicts the existence of tetragonal Mn4N phase. This explains the c/a ∼ 0.99 in the Mn4N films regardless of their film thickness and lattice mismatch with substrates used.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Magnetic properties of thin films · Heusler alloys: electronic and magnetic properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of Tsukuba 1 Institute of Applied Physics, Graduate School of Pure and Applied Sciences, , Tsukuba, Ibaraki 305-8573, Japan
Tohoku University 2 Department of Electronic Engineering, Graduate School of Engineering, , Sendai 980-8579, Japan
Japan Society for the Promotion of Science (JSPS) 3 , Chiyoda, Tokyo 102-0083, Japan
Funding
Japan Society for the Promotion of Science · Research Institute of Electrical Communication, Tohoku University
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