Structures and Dielectric Properties of Pb(Fe1/2Nb1/2)(1-x)TixO3 Single Crystals

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	Structures and Dielectric Properties of Pb(Fe1/2Nb1/2)(1-x)TixO3 Single Crystals
	K. Liu; X. Y. Zhang; S. Q. Wei; H. Oyanagi; J. Z. Xiao
	2012
发表期刊	Japanese Journal of Applied Physics
ISSN	0021-4922
卷号	51 期号:11
摘要	The structures and dielectric properties of Pb(Fe1/2Nb1/2)(1-x)TixO3 (PFNT, x = 0.07 and 0.48) single crystals were investigated using a combination of temperature-dependent dielectric, X-ray diffraction (XRD), Raman, and X-ray absorption fine structure (XAFS) spectra. Detailed structure analyses reveal that the crystal structure of PFNT (x = 0.48) is single-phase tetragonal perovskite, whereas that of PFNT (x = 0.07) is a mixture of rhombohedral and tetragonal phases. The structural differences are found to have significant connections with the dielectric properties in the temperature range of 90-300 K. Both samples exhibit a frequency-dependent dielectric anomaly, arising primarily from the 3d electrons hopping between Fe2+ and Fe3+. The second dielectric anomaly, which is a weak frequency dispersion and observable only for PFNT (x = 0.07), was probably caused by a dipole glass behavior near the morphotropic phase boundary. (C) 2012 The Japan Society of Applied Physics
部门归属	[liu, kui; zhang, xinyi; xiao, jingzhong] fudan univ, synchrotron radiat res ctr, state key lab surface phys, shanghai 200433, peoples r china. [liu, kui; zhang, xinyi; xiao, jingzhong] fudan univ, dept phys, shanghai 200433, peoples r china. [wei, shiqiang] univ sci & technol china, natl synchrotron radiat lab, hefei 230029, peoples r china. [oyanagi, hiroyuki] natl inst adv ind sci & technol, photon inst, tsukuba, ibaraki 3058568, japan. [xiao, jingzhong] chinese acad sci, int ctr mat sci, shenyang 110016, peoples r china.;liu, k (reprint author), fudan univ, synchrotron radiat res ctr, state key lab surface phys, shanghai 200433, peoples r china.;xy-zhang@fudan.edu.cn
关键词	Iron Fe Ceramics Region Xanes
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60114
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. Liu,X. Y. Zhang,S. Q. Wei,et al. Structures and Dielectric Properties of Pb(Fe1/2Nb1/2)(1-x)TixO3 Single Crystals[J]. Japanese Journal of Applied Physics,2012,51(11).
APA	K. Liu,X. Y. Zhang,S. Q. Wei,H. Oyanagi,&J. Z. Xiao.(2012).Structures and Dielectric Properties of Pb(Fe1/2Nb1/2)(1-x)TixO3 Single Crystals.Japanese Journal of Applied Physics,51(11).
MLA	K. Liu,et al."Structures and Dielectric Properties of Pb(Fe1/2Nb1/2)(1-x)TixO3 Single Crystals".Japanese Journal of Applied Physics 51.11(2012).