XAFS study on Mn-doped BiFeO

Yoneda, Yasuhiro   ; Noguchi, Yuji*; Miyayama, Masaru*; Kitanaka, Yuki*

BiFeO is not so large as intrinsic polarization is expected from a crystal structure since the coercive field is very large. However, good hysteresis is obtained by Mn-doping. In order to investigate the Mn dope effect of BiFeO, XAFS measurement was performed by each absorption edge of Bi, Fe, and Mn, and the estimate and local order structure of the valence were conducted. Since the valence and local structure of Mn are changing with annealing, they have suggested the importance of an oxygen deficiency.