Structural and magnetic characterization of spin canted mixed ferrite-cobaltites: LnFe0.5Co0.5O3 (Ln = Eu and Dy)

Ashish Shukla , Oleg Lebedev (1) , Md. Motin Seikh (2) , Asish Kundu (3, 1)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 Department of Chemistry, Visva Bharati University
3 IIIDTM Jabalpur - Indian Institute of Information Technology, Design and Manufacturing

The mixed ferrite-cobaltites LnFe0.5Co0.5O3, with Ln = Eu andamp; 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. © 2019 Elsevier B.V.

Mots clés: Antiferromagnet, Hysteresis loop, Sol-gel method, Weak ferromagnetism

Domaines: Physique [physics]

Ashish Shukla, Oleg Lebedev, Md. Motin Seikh, Asish Kundu. Structural and magnetic characterization of spin canted mixed ferrite-cobaltites: LnFe0.5Co0.5O3 (Ln = Eu and Dy). Journal of Magnetism and Magnetic Materials, 2019, 491, pp.165558. ⟨10.1016/j.jmmm.2019.165558⟩. ⟨hal-03817566⟩