The dynamical response to the node defect in thermally activated remagnetization of magnetic dot array

TL;DR

This study uses computer simulations to analyze how a nonmagnetic defect at the center of a magnetic dot array affects its dynamical remagnetization behavior under thermal activation, revealing significant differences from defect-free arrays.

Contribution

It introduces a detailed simulation approach to understand the impact of central node defects on the thermal dynamical response of magnetic dot arrays.

Findings

Significant differences in hysteresis and relaxation behaviors due to defects

Quantitative and qualitative changes in magnetic response

Insights into defect influence on magnetic remagnetization

Abstract

The influence of nonmagnetic central node defect on dynamical properties of regular square-shaped 5 x 5 segment of magnetic dot array under the thermal activation is investigated via computer simulations. Using stochastic Landau-Lifshitz-Gilbert equation we simulate hysteresis and relaxation processes. The remarkable quantitative and qualitative differences between magnetic dot arrays with nonmagnetic central node defect and magnetic dot arrays without defects have been found.