Switching dynamics between metastable ordered magnetic state and nonmagnetic ground state - A possible mechanism for photoinduced ferromagnetism -

TL;DR

This paper proposes a mechanism for photoinduced magnetization switching based on the metastable states of the Blume-Capel model, supported by theoretical and simulation studies, with implications for experimental magnetic materials.

Contribution

It introduces a reversible switching mechanism for magnetization using metastable states in the Blume-Capel model, combining mean field theory and Monte Carlo simulations.

Findings

Reversible magnetization changes modeled by parameter variations.

Metastability in the Blume-Capel model explains photoinduced magnetism.

Results align with experimental observations in prussian blue analogs.

Abstract

By studying the dynamics of the metastable magnetization of a statistical mechanical model we propose a switching mechanism of photoinduced magnetization. The equilibrium and nonequilibrium properties of the Blume-Capel (BC) model, which is a typical model exhibiting metastability, are studied by mean field theory and Monte Carlo simulation. We demonstrate reversible changes of magnetization in a sequence of changes of system parameters, which would model the reversible photoinduced magnetization. Implications of the calculated results are discussed in relation to the recent experimental results for prussian blue analogs.