Current-Induced Instability of a Perpendicular Ferromagnet in Spin Hall Geometry

Abstract

We develop a theoretical formula of spin Hall torque in the presence of two ferromagnets. While the direction of the conventional spin Hall torque always points to the in-plane direction, the present system enables to manipulate the torque direction acting on one magnetization by changing the direction of another magnetization. Based on the diffusion equation of the spin accumulation and the Landauer formula, we derive analytical formula of the spin Hall torque. The present model provides a solution to switch a perpendicular ferromagnet deterministically at zero field using the spin Hall effect.

5 pages, 2 figures, conference proceeding of Joing MMM/Intermag conference 2016

References in corpus (4)

• Theory of spin Hall magnetoresistance
• Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires
• Critical current of spin transfer torque-driven magnetization dynamics in magnetic multilayers
• Phase diagram and optimal switching induced by spin Hall effect in a perpendicular magnetic layer

Cited by in corpus (1)

• Indirect excitation of self-oscillation in perpendicular ferromagnet by spin Hall effect