日本磁気学会論文特集号
Online ISSN : 2432-0471
ISSN-L : 2432-0471
Thin Films, Fine Particles, Multilayers, Superlattices
Dependence of Thickness of Fe Buffer Layer on Magnetic Properties for Mn2.6Ga Thin Films
K. SatoY. TakahashiH. MakutaT. ShimaM. Doi
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ジャーナル オープンアクセス

2018 年 2 巻 2 号 p. 48-51

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D022-Mn2.6Ga thin films were fabricated by an ultra-high vacuum electron beam vapor deposition system on a MgO (100) single crystalline substrate with different buffer layer thicknesses (0.7 - 5 nm). As the annealing temperature Ta increased to 400℃, the squareness of the M-H curves improved, and the saturation magnetization Ms and magnetic anisotropy Ku increased. At that time, from XRD patterns, D022-Mn3Ga (002) superlattice and (004) fundamental peaks were clearly observed from all samples. Our results suggest the existence of a magnetic dead layer of about 3.5 nm in the MnGa layer. Because of this magnetic dead layer, a relatively high Ku of 9.3 Merg/cm3 and low surface roughness Ra of 0.93 nm were obtained from Mn2.6Ga thin film on a 2-nm Fe buffer at Ta = 400℃. The results in this work suggest that Fe is a suitable buffer layer for perpendicular magnetized D022-MnGa thin film.

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© 2018 The Magnetics Society of Japan
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