期刊
CERAMICS INTERNATIONAL
卷 41, 期 7, 页码 8511-8519出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.03.058
关键词
BiFeO3; Co-precipitation; Multiferroics; Dielectric; Antiferromagnetism
Crystalline solid solution of Bi1-xPrxFeO3 (x=0.05, 0.1, and 0.15) ceramics has been successfully synthesized by a low temperature assisted co-precipitation method. Rietveld-refinement of the X-ray diffraction data reveals rhombohedral structure for Bi1-xPrxFeO3 (x=0.05, 0.10) and triclinic for Bi1-xPrxFeO3 (x=0.15). The crystallite sizes of the Bi1-xPrxFeO3 (x=0.05, 0.1 and 0.15) are found to be approximately 33, 27 and 22 nm respectively calculated using Debye-Scherrer equation. The SEM images of Bi1-xPrxFeO3 (x=0.05, 0.10 and 0.15) ceramics show grains with almost spherical morphology. 4A1 and 7E Raman modes have been observed in the range 100-650 cm(-1) and two phonon modes centered around 1150-1450 cm(-1) have also been observed corresponding to 2A(4) (LO), 2E(8) (TO) and 2E(9) (TO) modes of Bi1-xPrxFeO3 (x=0.05, 0.1 and 0.15). The changes in Raman modes such as prominent frequency shift, line broadening and intensity have been noticed with the increase of Pr concentration in BiFeO3 (BFO) suggesting a structural transformation as revealed by the Rietveld refinement An anomaly in the temperature dependent dielectric studies has been noticed in all the samples at the vicinity of Neel temperature (T-N) indicating a magnetic ordering and an increase in magnetization with increase of Pr concentration is noticed from the room temperature magnetic studies. Further, the leakage current density is found to be reduced with increasing Pr concentration. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据