Field cycling‐induced evolution of functional properties in bismuth samarium ferrite ceramics
Field cycling‐induced evolution of functional properties in bismuth samarium ferrite ceramics
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DOI：
10.1111/jace.16347
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发表时间：
2019-08
影响因子：
3.9
通讯作者：
Lei Wang;R. Liang;Zhiyong Zhou;Ningtao Liu;Xianlin Dong
中科院分区：
文献类型：
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作者：
Lei Wang;R. Liang;Zhiyong Zhou;Ningtao Liu;Xianlin Dong
The field‐controlled phase transition is a promising concept for the design of novel multiferroic materials. Rare‐earth samarium‐modified bismuth ferrite (Bi1−xSmxFeO3) possesses a morphotropic phase boundary (MPB) that has similar free energies between the polar and nonpolar phases, making it an exceptional candidate. In this study, we investigated the electric field cycling‐dependent behavior of ferroelectricity in Bi1−xSmxFeO3ceramics near MPB. During electric field cycling, a significantly enhanced remanent polarization was observed. Cycled Bi0.86Sm0.14FeO3and Bi0.84Sm0.16FeO3exhibited enhanced ferroelectric (remanent polarization >30 μC/cm2) and magnetic (remanent magnetization >0.20 emu/g) properties at room temperature. Through a systematic study of dynamic hysteresis measurements and a structural analysis, these results were attributed to a field cycling‐induced nonpolar‐to‐polar phase transition. In situ high temperature measurements showed a previously unreported sharp anomaly of the piezoelectric coefficient (d33) near the magnetic transition point (TN). These results indicated a strong magnetoelectric coupling in rare earth‐modified bismuth ferrite materials, suggesting the possibility of magnetically modulated piezoelectricity.
