Temperature dependence of current-induced magnetic domain wall motion in an asymmetric Co/Ni nanowire

Autor:	Takuya Taniguchi, Ryo Hiramatsu, Teruo Ono, Takahiro Moriyama, Kohei Ueda, Kab-Jin Kim, Takayuki Tono
Rok vydání:	2015
Předmět:	Work (thermodynamics) Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Magnetic domain General Engineering Nanowire General Physics and Astronomy Torque Wall motion Current (fluid) Magnetic field Spin-½
Zdroj:	Japanese Journal of Applied Physics. 54:038004
ISSN:	1347-4065 0021-4922
DOI:	10.7567/jjap.54.038004
Popis:	We have investigated the temperature dependence of current-induced magnetic domain wall (DW) motion in a Co/Ni nanowire, where the spin Hall torque is responsible for the DW motion. The threshold current density (Jth) for DW motion is found to be dependent on the temperature T and the depinning magnetic field Hdep, which is different from the symmetric Co/Ni system where Jth is insensitive to T and Hdep. This result indicates that an extrinsic pinning governs the DW motion when it is driven by the spin Hall torque. Our work therefore suggests that reducing the extrinsic pinning is a key for achieving a low-power-consumption device.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::db6eb6b6ec80026d961cd39f8c11dcfb https://doi.org/10.7567/jjap.54.038004 Zobrazit plný text záznamu