2024-03-28T23:20:17Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00030322
2023-01-16T04:45:38Z
673:674:675
Spin orbit torques in ferrimagnetic GdFeCo with various compositions
Kawakami, Keisuke
100589
Kato, Takeshi
100590
Oshima, Daiki
100591
Iwata, Satoshi
100592
Compositional dependence of spin–orbit torque (SOT) of the bilayer comprised of Ta and ferrimagnetic GdFeCo was investigated. Critical current density of SOT switching J sw of the GdFeCo/Ta bilayers did not vary with Gd composition x, and were found to exhibit roughly J sw = 11 MA cm^−2. Two orthogonal components of SOT, damping-like torque τ DL and field-like torque τ FL were estimated by measuring harmonic Hall resistance under in-plane fields parallel and perpendicular to the AC current, respectively. The absolute values of SOT, midτ DLmid and midτ FLmid, were confirmed to be roughly constant within 22 ≤ x ≤ 28. On the other hand, the sign of τ FL changed across the compensation composition. These results suggest that the injected spin current is considered to exert a torque to the transition metal FeCo moment rather than to the rare earth Gd moment.
ファイル公開:2021-04-01
journal article
IOP publishing
2020-04
application/pdf
Japanese Journal of Applied Physics
SE
59
SEEF01
0021-4922
https://nagoya.repo.nii.ac.jp/record/30322/files/Kawakami_GdFeCo_r3.pdf
eng
https://doi.org/10.7567/1347-4065/ab51b5
This is an author-created, un-copyedited version of an article published in {Japanese Journal of Applied Physics}. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at {https://doi.org/10.7567/1347-4065/ab51b5}. “This Accepted Manuscript is available for reuse under a CC BY-NC-ND 4.0 licence after the 12 month embargo period provided that all the terms of the licence are adhered to”