AIP Advances (Mar 2017)

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
https://doi.org/10.1063/1.4979727
Journal volume & issue
Vol. 7, no. 3
pp. 035325 – 035325-5

Abstract

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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.