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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2005

Effect of pressure on the structural properties and Raman modes of LiCoO2

X. Wang
  • Fonction : Auteur
I. Loa
  • Fonction : Auteur
Karel Kunc
  • Fonction : Auteur
  • PersonId : 829935
K. Syassen
  • Fonction : Auteur
M. Amboage
  • Fonction : Auteur

Résumé

The high-pressure behavior of fully intercalated lithium cobaltite, LiCoO2, has been investigated by angle-dispersive synchrotron x-ray powder diffraction and Raman spectroscopy. The layered structure (Rm) is found to exist up to at least 26 GPa. From refinements of x-ray diffraction patterns information is derived on changes of Co-O and Li-O bond lengths under pressure. The stability of the ambient-pressure phase is confirmed by Raman spectroscopy. The pressure coefficients for the A1g and Eg Raman modes and their mode-Grüneisen parameters are reported as well as qualitative observations concerning unusual changes in width and intensity of the Raman lines under pressure. The obtained high-pressure structural and vibrational properties are compared to results of ab initio calculations.
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Dates et versions

hal-00017229 , version 1 (18-01-2006)

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X. Wang, I. Loa, Karel Kunc, K. Syassen, M. Amboage. Effect of pressure on the structural properties and Raman modes of LiCoO2. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2005, 72, pp.224102. ⟨10.1103/PhysRevB.72.224102⟩. ⟨hal-00017229⟩
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