Angular dependence of the magnetization relaxation in Co/Pt multilayers

Authors

Anil Adhikari, University of Nebraska-Lincoln
Bryce Herrington, University of Nebraska-Lincoln
Nhat Nguyen, University of Nebraska-Lincoln
Ruthi Zielinski, University of Nebraska-Lincoln
Ather Mahmood, University of Nebraska - LincolnFollow
S. Adenwalla, University of Nebraska-LincolnFollow
Robert Streubel, University of Nebraska-LincolnFollow

Date of this Version

9-29-2023

Citation

J. Phys.: Condens. Matter 36 (2024) 015802 (7pp). https://doi.org/10.1088/1361-648X/acfc8f

Comments

Used by permission.

Abstract

We study the influence of defects in Co/Pt multilayers on the room-temperature magnetization reversal and relaxation mechanisms via angle-dependent magnetic viscosity and coercive field measurements. The data reveal a transition from pinning-dominated domain wall propagation to a sequence of pinning-dominated and uniform switching, with increasing tilt away from the normal direction. The leading role of the dendritic domain wall propagation in the nanogranular exchange-coupled films is corroborated by the scaling of relaxation times, the angular dependence of the coercive field, and Kerr microscopy.