Abstract
Room temperature spontaneous magnetization and dielectric anomaly at Néel temperature are observed in 15% Eu doped bismuth ferrite indicating the multiferroic nature of the sample. With 15% Eu doping structural transformation from rhombohedral to triclinic is observed. Fe3+ and Eu3+ oxidation states are observed from F57e and E151u Mossbauer measurements, respectively. The high field F57e Mossbauer spectrum in longitudinal geometry shows an enhancement in the intensity of lines corresponding to Δm=0 transitions, i.e., second and fifth lines in six line pattern. This observation suggests that the origin of spontaneous magnetization is due to weak ferromagnetism of Dzyaloshinskii–Moriya type.
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