Special spin behavior of rare earth ions at the A site of polycrystalline ErFe1-xCrxO3 (x = 0.1, 0.9)

TL;DR

This study investigates the spin reorientation behavior of ErFe1-xCrxO3, revealing how A-site Er3+ spins change under DM interaction, providing insights for future spin device development.

Contribution

It introduces a detailed analysis of A-site spin behavior in ErFe1-xCrxO3, combining magnetization and Mössbauer spectra to understand spin reorientation mechanisms.

Findings

A-site Er3+ spins reorient under DM interaction.

Magnetization curves are well simulated by molecular field theory.

The study provides a theoretical basis for spin-controlled device fabrication.

Abstract

Thermally induced spin control is one of the main directions for future spin devices. In this study, we synthesized single-phase polycrystalline ErFe1-xCrxO3 and combined the magnetization curves and M\"ossbauer spectra to determine the macroscopic magnetism at room temperature. The magnetization of the system at various temperatures is well simulated by molecular field theory. And it is found that under the DM interaction, not only the B-site ions undergo a reorientation process, but the spins of the A-site ions also change at the same time. The effective spin is defined as the projection of Er3+ on the Fe3+/Cr3+ spin plane, and the whole reorientation process is obtained by fitting. This study will complement the actual process of ErFe1-xCrxO3 spin reorientation and will lay a theoretical foundation for the fabrication of future spin-controlled devices.