Strain-induced ultrafast magnetization dynamics in cubic magnetostrictive materials with inertial and nonlinear dissipative effects

Abstract

This article focuses on the analytical investigation of strain-induced ultrafast magnetic domain wall motion in a bilayer structure composed of piezoelectric and magnetostrictive materials. We perform the analysis within the framework of the inertial Landau–Lifshitz–Gilbert equation, which describes the evolution of magnetization in cubic magnetostrictive materials. By employing the classical traveling wave ansatz, the study explores how various factors such as magnetoelasticity, dry-friction, inertial damping, chemical composition, crystal symmetry, and tunable external magnetic field influence the motion of the domain walls in both steady-state and precessional dynamic regimes. The results provide valuable insights into how these key parameters can effectively modulate dynamic features such as domain wall width, threshold, Walker breakdown, and domain wall velocity. The obtained analytical results are further numerically illustrated, and a qualitative comparison with recent observations is also presented.