Antisite disorder-induced exchange bias effect in multiferroic Y2CoMnO6

Nair, Harikrishnan S.; Chatterji, Tapan; Strydom, André M.

doi:10.1063/1.4906204

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Antisite disorder-induced exchange bias effect in multiferroic Y₂CoMnO₆

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Strydom, André M.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Nair, H. S., Chatterji, T., & Strydom, A. M. (2015). Antisite disorder-induced exchange bias effect in multiferroic Y₂CoMnO₆. Applied Physics Letters, 106(2): 022407, pp. 1-4. doi:10.1063/1.4906204.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-9EE7-1

Abstract

Exchange bias effect in the ferromagnetic double perovskite compound Y2CoMnO6, which is also a multiferroic, is reported. The exchange bias, observed below 8 K, is explained as arising due to the interface effect between the ferromagnetic and antiferromagnetic clusters created by antisite disorder in this material. Below 8 K, prominent ferromagnetic hysteresis with metamagnetic “steps” and significant coercive field, Hc ≈ 10 kOe are observed in this compound which has a Tc ≈ 75 K. A model based on growth of ferromagnetic domains overcoming the elastic energy of structurally pinned magnetic interfaces, which closely resembles martensitic-like transitions, is adapted to explain the observed effects. The role of antisite disorder in creating the domain structure leading to exchange bias effect is highlighted in the present work