Spontaneous exchange bias in a nanocomposite of BiFeO3-Bi2Fe4O9
Das, Gopes C.
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.
Exchange interactions , Nanocomposites , Atomic force microscopy , Antiferromagnetism , Magnetic anisotropy
Maity, T., Goswami, S., Bhattacharya, D., Das, G. C. and Roy, S. (2013) 'Spontaneous exchange bias in a nanocomposite of BiFeO3-Bi2Fe4O9', Journal of Applied Physics, 113(17), 17D916 (3pp). doi: 10.1063/1.4796149
© 2013, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Maity, T., Goswami, S., Bhattacharya, D., Das, G. C. and Roy, S. (2013) 'Spontaneous exchange bias in a nanocomposite of BiFeO3-Bi2Fe4O9', Journal of Applied Physics, 113(17), 17D916 (3pp). doi: 10.1063/1.4796149 and may be found at http://aip.scitation.org/doi/10.1063/1.4796149