Reference : Suppression of the cooperative Jahn-Teller distortion and its effect on the Raman oct...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
Suppression of the cooperative Jahn-Teller distortion and its effect on the Raman octahedra-rotation modes of TbMn1-xFexO3
Vilarinho, R. [> >]
Passos, D. J. [> >]
Queiros, E. C. [> >]
Tavares, P. B. [> >]
Almeida, A. [> >]
Weber, M. C. [> >]
Guennou, Mael mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit]
Kreisel, Jens mailto [University of Luxembourg > Rectorate >]
Agostinho Moreira, J. [> >]
Physical Review. B
Yes (verified by ORBilu)
[en] Raman spectroscopy ; Perovskites ; Jahn-Teller
[en] This work reports the changes in structure and lattice dynamics induced by substituting the Jahn-Teller-active Mn3+ ion by the Jahn-Teller-inactive Fe3+ in TbMn1-xFexO3 over the full composition range. The structural analysis reveals that the amplitude of the 0 (pure 0.5, where it is completely suppressed. We then correlate this evolution with the behavior of the Raman modes across the solid solution. In particular, we show that the Raman modes associated with the rotation of octahedra, whose wave number is commonly considered to scale linearly with the tilt angles in orthorhombic Pnma perovskites are also sensitive to the amplitude of the Jahn-Teller distortion.

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