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Author He, Peng-Bin ♦ Yan, Han ♦ Cai, Meng-Qiu ♦ Li, Zai-Dong
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ANALYTIC FUNCTIONS ♦ ANISOTROPY ♦ BREAKDOWN ♦ CHIRALITY ♦ FERROMAGNETIC MATERIALS ♦ L-S COUPLING ♦ MAGNETIC FIELDS ♦ METALS ♦ NANOWIRES ♦ STABILITY ♦ TORQUE
Abstract The steady motion of magnetic domain wall driven by spin-orbit torques is investigated analytically in the heavy/ferromagnetic metal nanowires for three cases with a current transverse to the in-plane and perpendicular easy axis, and along the in-plane easy axis. By the stability analysis of Walker wall profile, we find that if including the higher-order spin-orbit torques, the Walker breakdown can be avoided in some parameter regions of spin-orbit torques with a current transverse to or along the in-plane easy axis. However, in the case of perpendicular anisotropy, even considering the higher-order spin-orbit torques, the velocity of domain wall cannot be efficiently enhanced by the current. Furthermore, the direction of wall motion is dependent on the configuration and chirality of domain wall with a current along the in-plane easy axis or transverse to the perpendicular one. Especially, the direction of motion can be controlled by the initial chirality of domain wall. So, if only involving the spin-orbit mechanism, it is preferable to adopt the scheme of a current along the in-plane easy axis for enhancing the velocity and controlling the direction of domain wall.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-14
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 22


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