Spontaneous exchange bias in a nanocomposite of BiFeO$_3$-Bi$_2$Fe$_4$O$_9$

Tuhin Maity; Sudipta Goswami; Dipten Bhattacharya; Gopes C. Das; Saibal Roy

doi:10.1063/1.4796149

paper

Spontaneous exchange bias in a nanocomposite of BiFeO $_{3}$ -Bi $_{2}$ Fe $_{4}$ O $_{9}$

arXiv:1304.2205 · doi:10.1063/1.4796149

Abstract

We have observed a large as well as path-dependent spontaneous exchange bias (H $_{S E B}$ ) ( $\sim$ 30-60 mT) in a nanocomposite of BiFeO $_{3}$ -Bi $_{2}$ Fe $_{4}$ O $_{9}$ across 5-300 K 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 - $Δ$ H $_{S E B}$ - is found to be decreasing nonmonotonically across 5-300 K with a peak around 200 K. The $Δ$ H $_{S E B}$ together with large H $_{S E B}$ could have significant ramification in tuning the exchange bias driven effects and consequent applications.

4 pages with 4 figures; published in J. Appl. Phys. (Proc. 12th Joint MMM-InterMag Conf)

References in corpus (1)

Particle size dependence of magnetization and non-centrosymmetry in nanoscale BiFeO3

Spontaneous exchange bias in a nanocomposite of BiFeO3​-Bi2​Fe4​O9​

Abstract

References in corpus (1)

Cited by in corpus (2)

Spontaneous exchange bias in a nanocomposite of BiFeO $_{3}$ -Bi $_{2}$ Fe $_{4}$ O $_{9}$