Substitution-induced phase transition and enhanced multiferroic properties of Bi1−xLaxFeO3 ceramics
Substitution-induced phase transition and enhanced multiferroic properties of Bi1−xLaxFeO3 ceramics
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DOI：
10.1063/1.2195927
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发表时间：
2006-04
影响因子：
4
通讯作者：
Shantao Zhang;Yi Zhang;Ming-Hui Lu;C. Du;Yan-Feng Chen;Zhi-guo Liu;Yong‐yuan Zhu;N. Ming
中科院分区：
文献类型：
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作者：
Shantao Zhang;Yi Zhang;Ming-Hui Lu;C. Du;Yan-Feng Chen;Zhi-guo Liu;Yong‐yuan Zhu;N. Ming
制备了单相绝缘Bi 1 − xLaxFeO 3（BLFOx，x=0.05、0.10、0.15、0.20、0.30和0.40）陶瓷。在x=0.30附近观察到一个明显的从菱方相到正交相的相变。研究发现，相变破坏了BiFeO 3（BFO）的自旋旋轮线，从而释放了锁定的磁化强度，增强了磁电相互作用。结果表明，BLFO 0.30陶瓷的剩余极化强度和磁化强度（2 Pr和2 Mr）分别为22.4μ Cscincm ~ 2和0.041emu scing。
Single-phase, insulating Bi1−xLaxFeO3 (BLFOx, x=0.05, 0.10, 0.15, 0.20, 0.30, and 0.40) ceramics were prepared. An obvious phase transition from rhombohedral to orthorhombic phase was observed near x=0.30. It is found that the phase transition destructs the spin cycloid of BiFeO3 (BFO), and therefore, releases the locked magnetization and enhances magnetoelectric interaction. As a result, improved multiferroic properties of the BLFO0.30 ceramics with remnant polarization and magnetization (2Pr and 2Mr) of 22.4μC∕cm2 and 0.041emu∕g, respectively, were established.