Structural evolution and physical properties of multiferroic Bi_0.9−xLa_0.1Pb_xFeO_3−x/2ceramics

Properties of Bi0.8Ln0.2FeO3 (Ln=La, Gd, Ho) multiferroic ceramics

“…the effect of a magnetic field on ferroelectric polarization or, conversely, that of an electric field on magnetic order [7,11,12]. Since magnetic field can induce the variation in polarization, the field can also indirectly alter the dielectric constant of ME multiferroics, which is called magentodielectric (MD) effect.…”

“…The enhanced magnetization in BHFO is not caused by the Bi 2 Fe 4 O 9 and Bi 25 FeO 39 impurities, because, Bi 25 FeO 39 is a paramagnetic at 5-950 K, and Bi 2 Fe 4 O 9 is an antiferromagnet with a Néel temperature of 258 K [19,20], both of them show a poor magnetic properties.The origin of the spontaneous magnetization in BiFeO 3 system is mainly explained as the suppression of spin structure[7,11,21]. Whereas, the mechanism of the spontaneous magnetization in lanthanides doped BiFeO 3 is more complex.…”