Correlation between Magnetic Properties and Depinning Field in Field-Driven Domain Wall Dynamics in GdFeCo Ferrimagnets

TL;DR

This study investigates how temperature affects the depinning field in GdFeCo ferrimagnets with perpendicular magnetic anisotropy, revealing a strong correlation between magnetic properties and domain wall motion.

Contribution

It establishes a theoretical and experimental relation between depinning field and magnetic properties, enhancing understanding of domain wall dynamics in ferrimagnets.

Findings

Depinning field strongly depends on temperature.

Saturation magnetization shows similar temperature dependence.

A theoretical relation between depinning field and magnetic anisotropy is confirmed.

Abstract

The influence of temperature on the magnetic-field-driven domain wall (DW) motion is investigated in GdFeCo ferrimagnets with perpendicular magnetic anisotropy (PMA). We find that the depinning field strongly depends on temperature. Moreover, it is also found that the saturation magnetization exhibits a similar dependence on temperature to that of depinning field. From the creep-scaling criticality, a simple relation between the depinning field and the properties of PMA is clearly identified theoretically as well as experimentally. Our findings open a way for a better understanding how the magnetic properties influence on the depinning field in magnetic system and would be valuably extended to depinning studies in other system.