Structural and Magnetic Characterization of Spin Canted Mixed Ferrite-Cobaltites: LnFe0.5Co0.5O3 (Ln = Eu and Dy)

TL;DR

This study investigates the structural and magnetic properties of LnFe0.5Co0.5O3 ferrite-cobaltites with Eu and Dy, revealing canted antiferromagnetic order and weak ferromagnetism near room temperature, with complex magnetic interactions and phenomena.

Contribution

It provides new insights into the magnetic behavior and interactions in mixed ferrite-cobaltites with Eu and Dy, highlighting spin canting and temperature-dependent magnetic phenomena.

Findings

Samples exhibit canted antiferromagnetic order near room temperature.

Weak ferromagnetism arises from Dzyaloshinskii-Moriya interaction.

Hysteresis observed at low temperatures due to magnetic interactions.

Abstract

The mixed ferrite-cobaltites LnFe0.5Co0.5O3, with Ln = Eu & Dy have been prepared by a sol-gel method and the samples have been characterized using X-ray diffraction and electron microscopy. The magnetic investigations reveal that both samples ordered in canted antiferromagnetic structures near room temperature. The Dzyaloshinskii-Moriya or antisymmetric exchange interaction induces weak ferromagnetism due to canting of the antiferromagnetically ordered spins. In the case of Ln-Fe-Co orthoferrites, two magnetic sublattices (Ln3+-4f and Fe3+/Co3+-3d) generally align in opposite directions and interesting temperature dependent phenomena: e.g. uncompensated antiferromagnetic sublattices and spin-reorientations, are observed in the system. The existence of hysteresis at low temperature region has been explained in terms of the strength of magnetic interactions between Fe3+ and Co3+ ions with different A-site rare earth cations.