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

ORLANDO V. BILLONI; FERNANDO POMIRO; SERGIO A. CANNAS; CHRISTINE MARTIN; ANTOINE MAIGNAN; RAUL E. CARBONIO

JOURNAL OF PHYSICS CONDENSED MATTER

IOP PUBLISHING LTD

Lugar: Londres; Año: 2016

0953-8984

In this work, we have performed Monte Carlo simulations in a classical model for RFe1−x Cr x O3 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 Fe3+ and Cr3+ ions with the x values variations.