Magnetization reversal in mixed ferrite-chromite perovskites with non magnetic cation on the A-site

TL;DR

This study uses Monte Carlo simulations to explore magnetization reversal in mixed ferrite-chromite perovskites, revealing how antisymmetric exchange interactions cause weak ferromagnetism and enable magnetization reversal phenomena.

Contribution

It introduces a classical model that accurately reproduces experimental magnetization reversal and critical temperature dependence in RFe$_{1-x}$Cr$_x$O$_3$ compounds.

Findings

Reproduces experimental magnetization reversal in simulations.

Shows dependence of critical temperatures on Cr concentration.

Identifies conditions for magnetization reversal based on Dzyaloshinskii-Moriya interactions.

Abstract

In this work, we have performed Monte Carlo simulations in a classical model for RFe$_{1-x}$Cr$_x$O$_3$ with R=Y and Lu, comparing the numerical simulations with experiments and mean field calculations. In the analyzed compounds, the antisymmetric exchange or Dzyaloshinskii-Moriya (DM) interaction induced a weak ferromagnetism due to a canting of the antiferromagnetically ordered spins. This model is able to reproduce the magnetization reversal (MR) observed experimentally in a field cooling process for intermediate $x$ values and the dependence with $x$ of the critical temperatures. We also analyzed the conditions for the existence of MR in terms of the strength of DM interactions between Fe$^{3+}$ and Cr$^{3+}$ ions with the x values variations.