MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films
Magnetic thin films showing high perpendicular magnetic anisotropy, Ku, and low saturation magnetization, Ms, 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...
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doaj-88d61acc53304e7e8074e90943636a912021-02-02T21:32:44ZengAIP Publishing LLCAIP Advances2158-32262021-01-01111015124015124-510.1063/9.0000138MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe filmsTakahide Kubota0Keita Ito1Rie Y. Umetsu2Masaki Mizuguchi3Koki Takanashi4Institute for Materials Research, Tohoku University, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanMagnetic thin films showing high perpendicular magnetic anisotropy, Ku, and low saturation magnetization, Ms, 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 Ms, which is attractive for spintronic application. In this study, the layer thickness dependence of Ku 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. Ku of about 2 × 106 erg/cm3 was achieved in a 5 nm-thick MnAlGe film using MgO buffer and capping exhibiting a low Ms value of approximately 200 emu/cm3 at room temperature. Although the magnitude of Ku is still in a moderate range, the low Ms is a promising feature for spintronic application.http://dx.doi.org/10.1063/9.0000138 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Takahide Kubota Keita Ito Rie Y. Umetsu Masaki Mizuguchi Koki Takanashi |
spellingShingle |
Takahide Kubota Keita Ito Rie Y. Umetsu Masaki Mizuguchi Koki Takanashi MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films AIP Advances |
author_facet |
Takahide Kubota Keita Ito Rie Y. Umetsu Masaki Mizuguchi Koki Takanashi |
author_sort |
Takahide Kubota |
title |
MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films |
title_short |
MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films |
title_full |
MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films |
title_fullStr |
MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films |
title_full_unstemmed |
MgO template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline MnAlGe films |
title_sort |
mgo template effect for perpendicular magnetic anisotropy in (001)-textured poly-crystalline mnalge films |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2021-01-01 |
description |
Magnetic thin films showing high perpendicular magnetic anisotropy, Ku, and low saturation magnetization, Ms, 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 Ms, which is attractive for spintronic application. In this study, the layer thickness dependence of Ku 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. Ku of about 2 × 106 erg/cm3 was achieved in a 5 nm-thick MnAlGe film using MgO buffer and capping exhibiting a low Ms value of approximately 200 emu/cm3 at room temperature. Although the magnitude of Ku is still in a moderate range, the low Ms is a promising feature for spintronic application. |
url |
http://dx.doi.org/10.1063/9.0000138 |
work_keys_str_mv |
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