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Development of chemically synthesized lead-free double perovskite compound: BiBaFeCeO 6
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-07-04 , DOI: 10.1007/s10854-020-03882-x
Kalpana Parida , R. N. P. Choudhary

In this communication, preliminary structural and detailed electrical (impedance, and conductivity) along with multiferroic (ferroelectric and ferromagnetisc) characteristics of a cost effective chemically processed double perovskite compound, BiBaFeCeO6, have been reported. By analyzing the X-ray diffraction data, the orthorhombic crystal structure of the compound with a single-phase characteristic is obtained. Combining the two simple perovskite materials, BiFeO3 with BaCeO3, in equal ratio produces a new double perovskite compound BibaFeCeO6 with the enhanced dielectric constant (as compared to that of individual perovskite). The shift in the dielectric peak and increase of peak broadening with increase in frequency suggest the existence of relaxation process and relaxor characterizes in the studied compound. The variation of the characteristic of dc conductivity with temperature displays the presence of semiconductor (negative temperature coefficient of resistance) behavior in the compound. Analysis of frequency dependence of ac conductivity data shows that the studied compound obeys the Jonscher’s universal power law. The analysis of complex impedance and modulus spectroscopy data exhibits the non-Debye type of relaxation mechanisms in the compound. The multiferroicity in the compound has been confirmed from the P–E, M–H hysteresis loop and M–E coupling characteristics.



中文翻译:

化学合成无铅双钙钛矿化合物BiBaFeCeO 6的开发

在这种交流中,已经报道了具有成本效益的化学处理的双钙钛矿化合物BiBaFeCeO 6的初步结构和详细的电学(阻抗和电导率)以及多铁性(铁电和铁磁)特性。通过分析X射线衍射数据,获得具有单相特性的化合物的斜方晶体结构。将两种简单的钙钛矿材料BiFeO 3与BaCeO 3结合在一起,以相同的比例生产出一种新的双钙钛矿化合物BibaFeCeO6,具有更高的介电常数(与单个钙钛矿相比)。介电峰的移动和峰展宽随频率的增加而增加,表明存在弛豫过程,弛豫特征是所研究化合物的特征。直流电导率特性随温度的变化显示了化合物中半导体(电阻的负温度系数)行为的存在。交流电导率数据的频率依赖性分析表明,所研究的化合物符合Jonscher的通用幂定律。复数阻抗和模量光谱数据的分析显示了化合物中非德拜型的弛豫机理。

更新日期:2020-07-05
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