Dynamic depinning phase transition in magnetic thin film with anisotropy

Abstract

The dynamic pinning effects induced by quenched disorder are significant in manipulating the domain-wall motion in nano-magnetic materials. Through numerical simulations of the nonstationary domain-wall dynamics with the Landau–Lifshitz–Gilbert equation, we confidently detect a dynamic depinning phase transition in a magnetic thin film with anisotropy, which is of second order. The transition field, static and dynamic exponents are accurately determined, based on the dynamic scaling behavior far from stationary.

Keywords

• dynamic critical phenomena
• magnetism
• Landau–Lifshitz–Gilbert equation
• domain walls