Maity, Tuhin and Goswami, Sudipta and Bhattacharya, Dipten and Das, Gopes C and Roy, Saibal (2013) Spontaneous exchange bias in a nanocomposite of BiFeO3-Bi2Fe4O9. Journal of Applied Physics, 113 (17). Article No-17D916. ISSN 0021-8979

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We have observed a large as well as path-dependent spontaneous exchange bias (H-SEB) (similar to 30-60 mT) in a nanocomposite of BiFeO3-Bi2Fe4O9 across 5-300K when it is measured in an unmagnetized state following zero-field cooling and appropriate demagnetization. The path dependency yields a variation in the exchange bias depending on the sign of the starting field and the path followed in tracing the hysteresis loop. The asymmetry thus observed-Delta H-SEB-is found to be decreasing nonmonotonically across 5-300K with a peak around 200K. The Delta H-SEB together with large H-SEB could have significant ramification in tuning the exchange bias driven effects and consequent applications. (c) 2013 American Institute of Physics.

Item Type: Article
Additional Information: 12th Joint MMM-Intermag Conference, Chicago, IL, JAN 14-18, 2013
Subjects: Electronics
Divisions: Nano-Structured Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 12 Sep 2013 08:58
Last Modified: 12 Sep 2013 08:58

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