Torque relaxation in Dzyaloshinskii-Moriya spin glasses: a numerical study

Abstract

The author presents results obtained from a Monte Carlo simulation of the torque relaxation in a classical Ruderman-Kittel-Kasuya-Yosida spin glass in the presence of weak anisotropic Dzyaloshinskii-Moriya interactions. The simulations are carried out at zero temperature and correspond to the short-time results observed in experiments. For weak anisotropy, the results are consistent with those seen in experiments on CuMn in the short-time limit. For strong anisotropy the qualitative features seen in the simulation are interesting and should be checked in experiments.