Author/Authors :
Tian، نويسنده , , Z.M. and Zhang، نويسنده , , Y.S. and Yuan، نويسنده , , S.L. and Wu، نويسنده , , M.S. and Wang، نويسنده , , C.H. and Ma، نويسنده , , Z.Z. and Huo، نويسنده , , S.X. and Duan، نويسنده , , H.N.، نويسنده ,
Abstract :
A series of multiferroic (1−x)BiFeO3−x(Bi0.5Na0.5)TiO3 (BF–BNT) (x = 0 − 0.6) solid solution ceramics were prepared by a sol–gel method. The XRD results show that increasing BNT content induce a gradual phase transformation from rhombohedral to pseudocubic structure near x = 0.4. Compared with pure BiFeO3, superior multiferroic properties are obtained for x = 0.3 with remnant polarization Pr = 1.49 μC/cm2 and saturated magnetization Ms = 0.51 emu/g. Importantly, the paramagnetic (PM) to ferromagnetic (FM) transition is observed for the solutions, and the Curie temperature (TC) can be tuned by varying the content of BNT. This observed FM ordering is discussed in terms of the possible existence of the long-range superexchange interaction of Fe3+–O–Ti–O–Fe3+ in the chemically ordered regions.
