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 language | English |
|---|---|
| Article number | 015401 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 23 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 Jan 12 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
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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 journal › Article
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*.
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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 -