Magnetic hysteresis in a molecular Ising ferrimagnet: Glauber dynamics approach

TL;DR

This paper develops a Glauber dynamics-based theory to explain the unusual hysteresis loops and coercive field behavior observed in Co(II)-based molecular magnets, linking experimental phenomena to stochastic magnetic dynamics.

Contribution

It introduces a novel theoretical model applying Glauber stochastic dynamics to molecular ferrimagnets, explaining experimental hysteresis behaviors in Co-based compounds.

Findings

Hysteresis loops similar to experimental data are reproduced by the model.

Temperature dependence of coercive fields shows characteristic inflection points.

Model relevance extends to other Co-based molecular magnets.

Abstract

Motivated by recent experimental results reporting giant coercive fields in Co(II)-based molecular magnets we present a theory of hysteresis phenomena based on the Glauber stochastic dynamics. Unusual form of hysteresis loops is similar to those of found in Co-based quasi-one-dimensional ferrimagnet CoPhOMe at low temperatures. Temperature dependence of the coercive field has a characteristic form with an inflection that may serve as an indicator of the Glauber dynamics in real compounds. A relevance of the model for other Co-based molecular magnets is discussed.