Isothermal remanent magnetization and the spin dimensionality of spin glasses

TL;DR

This paper investigates the dynamical magnetic properties of three-dimensional spin glasses with different spin dimensionalities using isothermal remanent magnetization, revealing how spin structure and interactions influence magnetic memory effects.

Contribution

It introduces a method to probe spin dimensionality effects in spin glasses through isothermal remanent magnetization measurements, highlighting differences in Heisenberg systems.

Findings

Heisenberg spin glasses recover spin structure and excess moment direction at $T_h$.

Isothermal remanent magnetization reflects the Dzyaloshinsky-Moriya interaction.

Differences observed among Ising, XY, and Heisenberg spin glasses.

Abstract

The isothermal remanent magnetization is used to investigate dynamical magnetic properties of spatially three dimensional spin glasses with different spin dimensionality (Ising, XY, Heisenberg). The isothermal remanent magnetization is recorded vs. temperature after intermittent application of a weak magnetic field at a constant temperature $T_h$. We observe that in the case of the Heisenberg spin glasses, the equilibrated spin structure and the direction of the excess moment are recovered at $T_h$. The isothermal remanent magnetization thus reflects the directional character of the Dzyaloshinsky-Moriya interaction present in Heisenberg systems.