Thermal reduction of the threshold current density for current-induced domain wall motion in Tb-Co magnetic alloy wire

Yuichiro Kurokawa; Ryogo Yoshimura; Satoshi Sumi; Hiroyuki Awano

doi:10.1063/1.4979727

Thermal reduction of the threshold current density for current-induced domain wall motion in Tb-Co magnetic alloy wire

Yuichiro Kurokawa, Ryogo Yoshimura, Satoshi Sumi, Hiroyuki Awano

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We investigated the current-induced domain wall motion (CIDWM) in Pt (3 nm)/Tb_0.34Co_0.66 (6 nm) alloy wire at various temperatures (T). The threshold current density (J_th) for the CIDWM in the Tb-Co alloy wire was 0.85 × 10¹¹ A/m² at room temperature, and drastically decreased as T was increased. Particularly, at T = 343 K, J_th (= 0.13 × 10¹¹ A/m²) was almost 7 times lower than that at room temperature. The reduction in J_th can be attributed to thermally activated creep motion and a reduction in the depinning current density. These results indicate that devices using CIDWM can be thermally assisted.

Original language	English
Article number	035325
Journal	AIP Advances
Volume	7
Issue number	3
DOIs	https://doi.org/10.1063/1.4979727
Publication status	Published - Mar 1 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.4979727

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title = "Thermal reduction of the threshold current density for current-induced domain wall motion in Tb-Co magnetic alloy wire",

abstract = "We investigated the current-induced domain wall motion (CIDWM) in Pt (3 nm)/Tb0.34Co0.66 (6 nm) alloy wire at various temperatures (T). The threshold current density (Jth) for the CIDWM in the Tb-Co alloy wire was 0.85 × 1011 A/m2 at room temperature, and drastically decreased as T was increased. Particularly, at T = 343 K, Jth (= 0.13 × 1011 A/m2) was almost 7 times lower than that at room temperature. The reduction in Jth can be attributed to thermally activated creep motion and a reduction in the depinning current density. These results indicate that devices using CIDWM can be thermally assisted.",

author = "Yuichiro Kurokawa and Ryogo Yoshimura and Satoshi Sumi and Hiroyuki Awano",

note = "Funding Information: We thank D. Bang for useful discussions. This work was financially supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)-Supported Program for Strategic Research Foundation at Private University (2014-2020) and MEXT KAKENHI Grant Number 26630137 (2014-2016). Publisher Copyright: {\textcopyright} 2017 Author(s).",

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doi = "10.1063/1.4979727",

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T1 - Thermal reduction of the threshold current density for current-induced domain wall motion in Tb-Co magnetic alloy wire

AU - Kurokawa, Yuichiro

AU - Yoshimura, Ryogo

AU - Sumi, Satoshi

AU - Awano, Hiroyuki

N1 - Funding Information: We thank D. Bang for useful discussions. This work was financially supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)-Supported Program for Strategic Research Foundation at Private University (2014-2020) and MEXT KAKENHI Grant Number 26630137 (2014-2016). Publisher Copyright: © 2017 Author(s).

PY - 2017/3/1

Y1 - 2017/3/1

N2 - We investigated the current-induced domain wall motion (CIDWM) in Pt (3 nm)/Tb0.34Co0.66 (6 nm) alloy wire at various temperatures (T). The threshold current density (Jth) for the CIDWM in the Tb-Co alloy wire was 0.85 × 1011 A/m2 at room temperature, and drastically decreased as T was increased. Particularly, at T = 343 K, Jth (= 0.13 × 1011 A/m2) was almost 7 times lower than that at room temperature. The reduction in Jth can be attributed to thermally activated creep motion and a reduction in the depinning current density. These results indicate that devices using CIDWM can be thermally assisted.

AB - We investigated the current-induced domain wall motion (CIDWM) in Pt (3 nm)/Tb0.34Co0.66 (6 nm) alloy wire at various temperatures (T). The threshold current density (Jth) for the CIDWM in the Tb-Co alloy wire was 0.85 × 1011 A/m2 at room temperature, and drastically decreased as T was increased. Particularly, at T = 343 K, Jth (= 0.13 × 1011 A/m2) was almost 7 times lower than that at room temperature. The reduction in Jth can be attributed to thermally activated creep motion and a reduction in the depinning current density. These results indicate that devices using CIDWM can be thermally assisted.

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Thermal reduction of the threshold current density for current-induced domain wall motion in Tb-Co magnetic alloy wire

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