Temperature-dependent Raman scattering of multiferroic Pb(Fe1/2Nb1/2)O-3
Garcia-Flores, A. F.1,2; Tenne, D. A.2; Choi, Y. J.3; Ren, W. J.4,5; Xi, X. X.1; Cheong, S. W.3
Corresponding AuthorGarcia-Flores, A. F.()
AbstractRaman scattering measurements on multiferroic Pb(Fe1/2Nb1/2)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 BO6 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*.
Funding OrganizationDOE
Indexed BySCI
Funding ProjectDOE[DE-FG02-01ER45907]
WOS Research AreaPhysics
WOS SubjectPhysics, Condensed Matter
WOS IDWOS:000285003400010
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Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorGarcia-Flores, A. F.
Affiliation1.Penn State Univ, Dept Phys, University Pk, PA 16802 USA
2.Boise State Univ, Dept Phys, Boise, ID 83725 USA
3.Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
5.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
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Garcia-Flores, A. F.,Tenne, D. A.,Choi, Y. J.,et al. Temperature-dependent Raman scattering of multiferroic Pb(Fe1/2Nb1/2)O-3[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2011,23(1):6.
APA Garcia-Flores, A. F.,Tenne, D. A.,Choi, Y. J.,Ren, W. J.,Xi, X. X.,&Cheong, S. W..(2011).Temperature-dependent Raman scattering of multiferroic Pb(Fe1/2Nb1/2)O-3.JOURNAL OF PHYSICS-CONDENSED MATTER,23(1),6.
MLA Garcia-Flores, A. F.,et al."Temperature-dependent Raman scattering of multiferroic Pb(Fe1/2Nb1/2)O-3".JOURNAL OF PHYSICS-CONDENSED MATTER 23.1(2011):6.
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