Reduction of back switching by large damping ferromagnetic material

Abstract

Recent studies on magnetization dynamics induced by spin-orbit torque have revealed a weak dependence of the critical current for magnetization switching on the damping constant of a ferromagnetic free layer. This study, however, reveals that the damping constant nevertheless plays a key role in magnetization switching induced by spin-orbit torque. An undesirable switching, returning to an initial state, named as back switching, occurs in a ferromagnet with an easy axis parallel to the current direction. Numerical and theoretical analyses reveal that back switching is strongly suppressed when the damping constant of the ferromagnet is large.

5 pages, 4 figures

References in corpus (2)

• Theoretical condition for switching the magnetization in a perpendicularly magnetized ferromagnet via the spin Hall effect
• Switching induced by spin Hall effect in an in-plane magnetized ferromagnet with the easy axis parallel to the current

Cited by in corpus (1)

• Out-of-plane magnetization oscillation in spin Hall device assisted by field-like torque