2021年1月1日
MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films
AIP Advances
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- 巻
- 11
- 号
- 1
- 開始ページ
- 015124
- 終了ページ
- 015124
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/9.0000138
- 出版者・発行元
- AIP Publishing
Magnetic thin films showing high perpendicular magnetic anisotropy, K-u, and low saturation magnetization, M-s, are essential for realizing a small switching current in spintronic devices utilizing the current induced magnetization switching phenomena. The Cu2Sb-type MnAlGe intermetallic compound is a material showing uniaxial magnetocrystalline anisotropy with a relatively low M-s, which is attractive for spintronic application. In this study, the layer thickness dependence of K-u was investigated in poly-crystalline MnAlGe films, and the MgO template effect is discussed to achieve perpendicularly magnetized films in a few-nanometer thickness range. Experimental results suggested that the (001)-texture for the perpendicular magnetization was promoted by the MgO(001) template through the solid-phase epitaxy growth by annealing, which is similar with that in conventionally used CoFeB|MgO layered samples. K-u of about 2 x 10(6) erg/cm(3) was achieved in a 5 nm-thick MnAlGe film using MgO buffer and capping exhibiting a low M-s value of approximately 200 emu/cm(3) at room temperature. Although the magnitude of K-u is still in a moderate range, the low M-s is a promising feature for spintronic application.
- リンク情報
- ID情報
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- DOI : 10.1063/9.0000138
- eISSN : 2158-3226
- Web of Science ID : WOS:000609444500001