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Get Free AccessTemperature-dependent Raman spectra of TbMnO(3) from 5 to 300 K in the spectral range of 200-1525 cm(-1) show five first-order Raman allowed modes and two high frequency modes. The intensity ratio of the high frequency Raman band to the corresponding first-order Raman mode is nearly constant and high (∼0.6) at all temperatures, suggesting an orbiton-phonon mixed nature of the high frequency mode. One of the first-order phonon modes shows anomalous softening below T(N) (∼46 K), suggesting a strong spin-phonon coupling.
Pradeep Kumar, Surajit Saha, D. V. S. Muthu, Jyoti Ranjan Sahu, A. K. Sood, Cnr Rao (2010). Raman evidence for orbiton-mediated multiphonon scattering in multiferroic TbMnO<sub>3</sub>. Journal of Physics Condensed Matter, 22(11), pp. 115403-115403, DOI: 10.1088/0953-8984/22/11/115403.
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Type
Article
Year
2010
Authors
6
Datasets
0
Total Files
0
Language
English
Journal
Journal of Physics Condensed Matter
DOI
10.1088/0953-8984/22/11/115403
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