Spin-transfer switching in full-Heusler Co 2FeAl-based magnetic tunnel junctions

Hiroaki Sukegawa; Zhenchao Wen; Kouta Kondou; Shinya Kasai; Seiji Mitani; Koichiro Inomata

doi:10.1063/1.4710521

Spin-transfer switching in full-Heusler Co ₂FeAl-based magnetic tunnel junctions

Hiroaki Sukegawa, Zhenchao Wen, Kouta Kondou, Shinya Kasai, Seiji Mitani, Koichiro Inomata

研究成果: Article › 査読

44 被引用数 (Scopus)

抄録

We demonstrated spin-transfer magnetization switching using magnetic tunnel junctions (MTJs) with a full-Heusler alloy Co ₂FeAl (CFA). We prepared CFA (1.5 nm)/MgO/CoFe (4 nm) (CFA-free) and CFA (30 nm)/MgO/CoFeB (2 nm) (CFA-reference) MTJs on a Cr(001) layer. The intrinsic critical current density (J _c0) of the CFA-free (CFA-reference) MTJ was 29 MA/cm ² (7.1 MA/cm ²). The larger J _c0 of the CFA-free MTJ is attributed to the significant enhancement of the Gilbert damping factor (∼0.04) of the CFA due to the Cr layer. The J _c0 of the CFA-reference is as small as that reported for typical CoFeB/MgO/CoFeB MTJs.

本文言語	English
論文番号	182403
ジャーナル	Applied Physics Letters
巻	100
号	18
DOI	https://doi.org/10.1063/1.4710521
出版ステータス	Published - 2012 4月 30
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（その他）

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10.1063/1.4710521

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title = "Spin-transfer switching in full-Heusler Co 2FeAl-based magnetic tunnel junctions",

abstract = "We demonstrated spin-transfer magnetization switching using magnetic tunnel junctions (MTJs) with a full-Heusler alloy Co 2FeAl (CFA). We prepared CFA (1.5 nm)/MgO/CoFe (4 nm) (CFA-free) and CFA (30 nm)/MgO/CoFeB (2 nm) (CFA-reference) MTJs on a Cr(001) layer. The intrinsic critical current density (J c0) of the CFA-free (CFA-reference) MTJ was 29 MA/cm 2 (7.1 MA/cm 2). The larger J c0 of the CFA-free MTJ is attributed to the significant enhancement of the Gilbert damping factor (∼0.04) of the CFA due to the Cr layer. The J c0 of the CFA-reference is as small as that reported for typical CoFeB/MgO/CoFeB MTJs.",

author = "Hiroaki Sukegawa and Zhenchao Wen and Kouta Kondou and Shinya Kasai and Seiji Mitani and Koichiro Inomata",

note = "Funding Information: We thank Tomohiro Taniguchi for his valuable discussion of the fitting calculations. This work was partly supported by CREST-JST, a Grant-in-Aid for Young Scientists (A) (Grant No. 22686066) from the Japanese Ministry of Education, Culture, Sports, Science and Technology, and a JST-EPSRC joint program.",

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AU - Mitani, Seiji

AU - Inomata, Koichiro

N1 - Funding Information: We thank Tomohiro Taniguchi for his valuable discussion of the fitting calculations. This work was partly supported by CREST-JST, a Grant-in-Aid for Young Scientists (A) (Grant No. 22686066) from the Japanese Ministry of Education, Culture, Sports, Science and Technology, and a JST-EPSRC joint program.

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N2 - We demonstrated spin-transfer magnetization switching using magnetic tunnel junctions (MTJs) with a full-Heusler alloy Co 2FeAl (CFA). We prepared CFA (1.5 nm)/MgO/CoFe (4 nm) (CFA-free) and CFA (30 nm)/MgO/CoFeB (2 nm) (CFA-reference) MTJs on a Cr(001) layer. The intrinsic critical current density (J c0) of the CFA-free (CFA-reference) MTJ was 29 MA/cm 2 (7.1 MA/cm 2). The larger J c0 of the CFA-free MTJ is attributed to the significant enhancement of the Gilbert damping factor (∼0.04) of the CFA due to the Cr layer. The J c0 of the CFA-reference is as small as that reported for typical CoFeB/MgO/CoFeB MTJs.

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