Magnetization switching by nanosecond pulse of electric current in thin ferrimagnetic film near compensation temperature

Abstract

We report on a theoretical study of thermal magnetization switching induced by nanosecond electric current pulse using Lagrangian formalism based on the Landau–Lifshitz–Gilbert equation. The parameters for modeling are obtained from the measurements of the anomalous Hall resistance at different probe currents. We obtain the switching diagrams, analyze how the switching rate depends on the pulse parameters and the applied magnetic field, and find the optimal set of values such as orientation of the field, electric pulse duration, and energy consumption. We find that the magnetization switching is particularly efficient near the compensation point, where a decrease in the magnetization of the rare-earth sublattices by 10% or less can lead to reversal of net magnetization.

Ultrafast heat-assisted magnetization dynamics in a ferrimagnetic insulator

“…While such an approximation overlooks the multisublattice nature of the iron garnet, it can be used far from the compensation temperature T M [32]. The dynamics is further described using the Lagrange formalism and the Rayleigh dissipation function [33][34][35]:…”

Theoretical realization of rich magnon topology by symmetry-breaking in honeycomb bilayer ferromagnets

“…We adopt the semi-classical linear spin wave approach [53][54][55][56][57][58][59][60][61][62] to derive the momentum-space…”

Phase transitions in rare-earth ferrimagnets with surface anisotropy near the magnetization compensation point

“…Depending on the composition, FiM films may have the magnetization compensation point T M where the antiferromagneticaly coupled RE and TM magnetizations compensate each other [9]. This point plays an important role for studying the magnetic phase transitions or magnetization dynamics of the FiM films [10][11][12].…”