Magnetoelectric effect in simple collinear antiferromagnetic spinels

Saha, Rana ; Ghara, Somnath ; Suard, Emmanuelle ; Jang, Dong Hyun ; Kim, Kee Hoon ; Ter-Oganessian, N. V. ; Sundaresan, A. (2016) Magnetoelectric effect in simple collinear antiferromagnetic spinels Physical Review B: Condensed Matter and Materials Physics, 94 (1). ISSN 2469-9950

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We report the discovery of the linear magnetoelectric effect in a family of spinel oxides, Co3O4 and MnB2O4(B= Al,Ga) with simple collinear antiferromagnetic spin structure. An external magnetic field induces a dielectric anomaly at TN , accompanied by the generation of electric polarization that varies linearly with magnetic field. Magnetization and magnetoelectric measurements on a single crystal of MnGa2O4 together with a phenomenological theory suggest that the easy axis direction is [111] with the corresponding magnetic symmetry R¯3′m′ . The proposed theoretical model of single-ion contribution of magnetic ions located in a noncentrosymmetric crystal environment stands for a generic mechanism for observing magnetoelectric effects in these and other similar materials.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:119998
Deposited On:21 Jun 2021 09:20
Last Modified:21 Sep 2021 10:50

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