Ferromagnetism in Fe-doped BaTiO3 Ceramics

Polycrystalline samples of BaTi1-xFexO3 (x = 0.00-0.30) are prepared by solid-state reaction method and their structural and magnetic properties are studied. Detailed investigation of XRD patterns reveal the coexistence of tetragonal (space group P4mm) and hexagonal phases (space group P6 (3)/mmc) for x ae 0.1. Magnetic measurements reveal room-temperature ferromagnetism in x = 0.15-0.3 samples, and their ferromagnetic transition temperature increases from 397 K for x = 0.15 to 464 K for x = 0.3. The initial magnetization curves for x = 0.15-0.3 are analyzed in terms of bound magnetic polaron (BMP) model. The analysis of susceptibility data in the paramagnetic region by Curie-Weiss law confirms the ferromagnetic transition for x ae 0.15 and the effective magnetic moment systematically increases with increase in Fe concentration.