Reentrant spin-glass transition in a dilute magnet

TL;DR

This paper reports large-scale Monte Carlo simulations of a dilute Heisenberg model, revealing a reentrant spin-glass transition characterized by ferromagnetic clusters, with magnetization behavior changing non-monotonically as temperature decreases.

Contribution

The study demonstrates the occurrence of a reentrant spin-glass transition in a dilute classical Heisenberg model with specific interactions, supported by extensive simulation data.

Findings

Reentrant spin-glass transition observed

Magnetization peaks and then decreases at lower temperatures

Low temperature phase characterized by ferromagnetic clusters

Abstract

We have performed a large scale Monte Carlo simulation of a dilute classical Heisenberg model with ferromagnetic nearest neighbor and antiferromagnetic next-nearest neighbor interactions. We found that the model reproduces a reentrant spin-glass transition. That is, as the temperature is decreased, the magnetization increases rapidly below a certain temperature, reaches a maximum value, then ceases at some lower temperature. The low temperature phase was suggested to be a spin-glass phase that is characterized by ferromagnetic clusters.