Exchange bias in a mixed metal oxide based magnetocaloric compound YFe0.5Cr0.5O3

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:414

Article

Sharma, Mohit K.¹  Singh, Karan¹  Mukherjee, K.¹ 

[1] Indian Inst Technol Mandi, Sch Basic Sci, Mandi 175005, Himachal Prades, India

关键词: Magnetically ordered materials;    Magnetization;    Magnetocaloric effect;    Magnetic measurements;   

DOI  :  10.1016/j.jmmm.2016.04.047

来源: Elsevier

【 摘 要 】

We report a detailed investigation of magnetization, magnetocaloric effect and exchange bias studies on a mixed metal oxide YFe0.5Cr0.5O3 belonging to perovskite family. Our results reveal that the compound is in canted magnetic state (CMS) where ferromagnetic correlations are present in an antiferromagnetic state. Magnetic entropy change of this compound follows a power law (Delta S-M similar to H-m) dependence of magnetic field. In this compound, inverse magnetocaloric effect (IMCE) is observed below 260 K while conventional magnetocaloric effect (CMCE) above it. The exponent 'm' is found to be independent of temperature and field only in the IMCE region. Investigation of temperature and magnetic field dependence studies of exchange bias, reveal a competition between effective Zeeman energy of the ferromagnetic regions and anisotropic exchange energy at the interface between ferromagnetic and anti ferromagnetic regions. Variation of exchange bias due to temperature and field cycling is also investigated. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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