Temperature-dependent Raman scattering of multiferroic Pb(Fe 1/2Nb1/2)O3

A. F. García-Flores, D. A. Tenne, Y. J. Choi, W. J. Ren, X. X. Xi, S. W. Cheong

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Raman scattering measurements on multiferroic Pb(Fe1/2Nb 1/2)O3 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∼ 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*∼ 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 Tn∼ 143 K. These anomalous deviations at Tn 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*.

Original languageEnglish
Article number015401
JournalJournal of Physics Condensed Matter
Volume23
Issue number1
DOIs
Publication statusPublished - 2011 Jan 12

Fingerprint

Raman scattering
Raman spectra
Temperature
frequency shift
temperature
vibration mode
degrees of freedom
anomalies
Stretching
Ferroelectric materials
deviation
Magnetization
temperature dependence
room temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

García-Flores, A. F. ; Tenne, D. A. ; Choi, Y. J. ; Ren, W. J. ; Xi, X. X. ; Cheong, S. W. / Temperature-dependent Raman scattering of multiferroic Pb(Fe 1/2Nb1/2)O3. In: Journal of Physics Condensed Matter. 2011 ; Vol. 23, No. 1.
@article{3e64c060302945d0813106cf4d7f8f8b,
title = "Temperature-dependent Raman scattering of multiferroic Pb(Fe 1/2Nb1/2)O3",
abstract = "Raman scattering measurements on multiferroic Pb(Fe1/2Nb 1/2)O3 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∼ 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*∼ 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 Tn∼ 143 K. These anomalous deviations at Tn 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*.",
author = "Garc{\'i}a-Flores, {A. F.} and Tenne, {D. A.} and Choi, {Y. J.} and Ren, {W. J.} and Xi, {X. X.} and Cheong, {S. W.}",
year = "2011",
month = "1",
day = "12",
doi = "10.1088/0953-8984/23/1/015401",
language = "English",
volume = "23",
journal = "Journal of Physics Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "1",

}

Temperature-dependent Raman scattering of multiferroic Pb(Fe 1/2Nb1/2)O3. / García-Flores, A. F.; Tenne, D. A.; Choi, Y. J.; Ren, W. J.; Xi, X. X.; Cheong, S. W.

In: Journal of Physics Condensed Matter, Vol. 23, No. 1, 015401, 12.01.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Temperature-dependent Raman scattering of multiferroic Pb(Fe 1/2Nb1/2)O3

AU - García-Flores, A. F.

AU - Tenne, D. A.

AU - Choi, Y. J.

AU - Ren, W. J.

AU - Xi, X. X.

AU - Cheong, S. W.

PY - 2011/1/12

Y1 - 2011/1/12

N2 - Raman scattering measurements on multiferroic Pb(Fe1/2Nb 1/2)O3 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∼ 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*∼ 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 Tn∼ 143 K. These anomalous deviations at Tn 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*.

AB - Raman scattering measurements on multiferroic Pb(Fe1/2Nb 1/2)O3 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∼ 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*∼ 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 Tn∼ 143 K. These anomalous deviations at Tn 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*.

UR - http://www.scopus.com/inward/record.url?scp=78651516985&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78651516985&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/23/1/015401

DO - 10.1088/0953-8984/23/1/015401

M3 - Article

C2 - 21406823

AN - SCOPUS:78651516985

VL - 23

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 1

M1 - 015401

ER -