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arXiv · 1812.09031

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

Ashish Shukla·Oleg I. Lebedev·Md. Motin Seikh·Asish K. Kundu
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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.

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Ashish Shukla, Oleg I. Lebedev, Md. Motin Seikh, Asish K. Kundu. 2018-12-21. Structural and Magnetic Characterization of Spin Canted Mixed Ferrite-Cobaltites: LnFe0.5Co0.5O3 (Ln = Eu and Dy). https://doi.org/10.1016/j.jmmm.2019.165558

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