Improved ferroelectric, piezoelectric, and magnetic properties in BiFeO3–(Ba0.85Ca0.15)TiO3 ceramics through Mn addition
Improved ferroelectric, piezoelectric, and magnetic properties in BiFeO3–(Ba0.85Ca0.15)TiO3 ceramics through Mn addition
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DOI：
10.1063/5.0026210
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发表时间：
2020-10
影响因子：
3.2
通讯作者：
M. Shu;Dong Wang;Sumei Li;Bingbing Yang;L. Yin;W. Song;Jie Yang;Xuebin Zhu;Yuping Sun
中科院分区：
文献类型：
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作者：
M. Shu;Dong Wang;Sumei Li;Bingbing Yang;L. Yin;W. Song;Jie Yang;Xuebin Zhu;Yuping Sun
为了满足设备小型化的需求，在一个化合物中集成多种功能仍然是有吸引力的和必要的。本文系统地研究了添加MnO2的0.74BiFeO3-0.26(Ba0.85Ca0.15)TiO3-xMnO2固溶体的多功能性质。当x=0.8时，得到了高度矩形的饱和极化滞后(P-E)环，其剩余极化Pr为49.5μC/cm2。此外，由于颗粒尺寸效应、绝缘性的改善和弛豫调节，MnO2的引入也明显提高了材料的d33，优化后的d33=137pC/N。随着MnO2的加入，由于Fe2+和Fe3+之间的交换作用增强，剩余磁化强度Mr单调增加。研究结果为探索BiFeO_3基陶瓷的多功能材料提供了一条有效的途径。
Integrating multiple functions in a single compound is still attractive and necessary to meet the demand of device miniaturization. In this work, we systemically modulate multifunctional properties in the 0.74BiFeO 3–0.26(Ba 0.85Ca 0.15)TiO 3– x wt. % MnO 2 solid solution with the addition of MnO 2. A highly rectangular and saturated polarization–hysteresis (P–E) loop is obtained with a large remanent polarization P r of 49.5 μC/cm 2 as x = 0.8. Furthermore, the piezoelectric coefficient d 33 also obviously improved with an optimized d 33 = 137 pC/N by the introduction of MnO 2 due to the grain size effect, the improvement of insulation, and relaxation regulation. With the addition of MnO 2, the remanent magnetization M r increases monotonically because of the enhanced exchange interactions between Fe 2 +and Fe 3 +. The results may provide an effective way to explore promising multifunctional materials in BiFeO 3-based ceramics.