TY - JOUR
T1 - Inactivation of damping-like torque in Tb-Gd-Fe film on Ta layer
AU - Kurokawa, Yuichiro
AU - Itoh, Masahiro
AU - Wakae, Masakazu
AU - Fujimoto, Masahiro
AU - Kamihoki, Uraku
AU - Yuasa, Hiromi
N1 - Funding Information:
We thank Mr. I. Chida for his support with the experimental setup. We are also grateful to Prof. T. Kimura, Dr. K. Ohnishi, and Mr. T. Takao for the use of the experimental equipment. This work was financially supported by the JSPS KAKENHI under Grant No. 21K14487, the Iketani Science and Technology Foundation, a research grant from the Mazda Foundation, and the Hattorihokokai Foundation.
Publisher Copyright:
© 2022 The Japan Society of Applied Physics.
PY - 2022/5
Y1 - 2022/5
N2 - Recently, bulk spin-orbit torques (SOTs) in transition metal-rare earth (TM-RE) ferrimagnets have been reported. In this study, to investigate bulk SOTs, we observed the current-induced effective field mediated by a damping-like torque (DLT), which is one of the components of SOTs, using TM-RE ferrimagnetic Tbx(Gd32Fe68)100-x films with a Ta layer. The DLT efficiency ζDL was inactivated by increasing the Tb composition x to be greater than 8, suggesting that the DLT was induced by the bulk SOTs of Tbx(Gd32Fe68)100-x as well as the spin Hall effect in the Ta. However, from the DLT measurement using a Tb8(Gd32Fe68)92 layer sandwiched between Ru layers, where Ru has a negligibly small DLT, ζDL was almost zero. This indicates that the inactivation of DLT cannot simply be explained by the bulk SOTs of Tbx(Gd32Fe68)100-x. However, we expect that this finding will provide meaningful insights for controlling magnetization using current.
AB - Recently, bulk spin-orbit torques (SOTs) in transition metal-rare earth (TM-RE) ferrimagnets have been reported. In this study, to investigate bulk SOTs, we observed the current-induced effective field mediated by a damping-like torque (DLT), which is one of the components of SOTs, using TM-RE ferrimagnetic Tbx(Gd32Fe68)100-x films with a Ta layer. The DLT efficiency ζDL was inactivated by increasing the Tb composition x to be greater than 8, suggesting that the DLT was induced by the bulk SOTs of Tbx(Gd32Fe68)100-x as well as the spin Hall effect in the Ta. However, from the DLT measurement using a Tb8(Gd32Fe68)92 layer sandwiched between Ru layers, where Ru has a negligibly small DLT, ζDL was almost zero. This indicates that the inactivation of DLT cannot simply be explained by the bulk SOTs of Tbx(Gd32Fe68)100-x. However, we expect that this finding will provide meaningful insights for controlling magnetization using current.
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U2 - 10.35848/1347-4065/ac3fcb
DO - 10.35848/1347-4065/ac3fcb
M3 - Article
AN - SCOPUS:85125520022
VL - 61
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - SC
M1 - SC1025
ER -