Temperature-dependent Raman scattering of multiferroic Pb(Fe(1/2)Nb(1/2))O(3)

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	Temperature-dependent Raman scattering of multiferroic Pb(Fe(1/2)Nb(1/2))O(3)
	A. F. Garcia-Flores; D. A. Tenne; Y. J. Choi; W. J. Ren; X. X. Xi; S. W. Cheong
	2011
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	23 期号:1
摘要	Raman scattering measurements on multiferroic Pb(Fe(1/2)Nb(1/2))O(3) over a wide temperature range from 10 to 500 K were performed. Very broad and overlapping peaks (first-order character) and a prominent high-frequency peak at similar to 1130 cm(-1), which we assign as a two-phonon peak, were observed. These features showed remarkable changes in their Raman scattering intensity and spectral shape at the characteristic temperature T* similar to 330 K, clearly showing a structural lattice change at around T. The temperature dependence of some stretching vibration modes of the BO(6) units revealed an anomalous frequency shift below T(N) similar to 143 K. These anomalous deviations at T(N) of the phonon frequency are associated with the spin-phonon coupling mechanism. Complementary magnetic data confirmed a weak magnetic ordering at room temperature and interestingly showed an anomaly at about T. These results suggest an interplay between ferroelectric, structural and magnetic degrees of freedom in PFN, starting to be significant at around T*.
部门归属	[garcia-flores, a. f.; xi, x. x.] penn state univ, dept phys, university pk, pa 16802 usa. [garcia-flores, a. f.; tenne, d. a.] boise state univ, dept phys, boise, id 83725 usa. [choi, y. j.; cheong, s. w.] rutgers state univ, dept phys & astron, piscataway, nj 08854 usa. [ren, w. j.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [ren, w. j.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;garcia-flores, af (reprint author), penn state univ, dept phys, 104 davey lab, university pk, pa 16802 usa
关键词	X-ray Order Spectroscopy Diffraction Niobate
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30345
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	A. F. Garcia-Flores,D. A. Tenne,Y. J. Choi,et al. Temperature-dependent Raman scattering of multiferroic Pb(Fe(1/2)Nb(1/2))O(3)[J]. Journal of Physics-Condensed Matter,2011,23(1).
APA	A. F. Garcia-Flores,D. A. Tenne,Y. J. Choi,W. J. Ren,X. X. Xi,&S. W. Cheong.(2011).Temperature-dependent Raman scattering of multiferroic Pb(Fe(1/2)Nb(1/2))O(3).Journal of Physics-Condensed Matter,23(1).
MLA	A. F. Garcia-Flores,et al."Temperature-dependent Raman scattering of multiferroic Pb(Fe(1/2)Nb(1/2))O(3)".Journal of Physics-Condensed Matter 23.1(2011).