Antisite disorder-induced exchange bias effect in multiferroic Y2CoMnO6

作者：Nair Harikrishnan S^*; Chatterji Tapan; Strydom Andre M

来源：Applied Physics Letters, 2015, 106(2): 022407.

DOI：10.1063/1.4906204

Exchange bias effect in the ferromagnetic double perovskite compound Y2CoMnO6, which is also a multiferroic, is reported. The exchange bias, observed below 8K, is explained as arising due to the interface effect between the ferromagnetic and antiferromagnetic clusters created by antisite disorder in this material. Below 8K, prominent ferromagnetic hysteresis with metamagnetic "steps" and significant coercive field, H-c approximate to 10 kOe are observed in this compound which has a T-c approximate to 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.

• 出版日期2015-1-12