Detection of an ordering of lithium sublattice in LiKSO4 in low-temperature phases via raman scattering |
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| Institution: | 1. Unité de recherche de physique des matériaux isolants et semi isolants, Faculté des Sciences de Sfax, Université du Sfax, Route de Soukra Km 3.5, BP 1171, 3000, Sfax, Tunisia;2. Laboratoire Physico-Chimique de L’Etat Solide, Université du Sfax, Faculté des Sciences de Sfax, Route de Soukra Km 3.5, BP 802, Sfax 3018, Tunisia;3. LUNAM Université, Université du Maine, CNRS UMR 6283, Institut des Molécules et Matériaux du Mans(IMMM), Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France;1. Laboratoire Physico-Chimique de L’Etat Solide LR/11/ES-51, Faculte´ des Sciences de Sfax, Route de Soukra Km 3.5, BP 802, 3018 Sfax, Tunisia;2. Department de Fisica, Universitat de Girona, Campus Montilivi, Girona 17071, Spain;3. LUNAM Université, Université du Maine, CNRS UMR 6283, Institut des Molécules et Matériaux du Mans(IMMM), Avenue Olivier Messiaen, 72085 Le Mans Cedex, France |
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| Abstract: | The polarized Raman spectra of LiKSO4 in low-temperature phases have been investigated and the group-theoretical analysis of normal vibrations in all possibly realizing phases has been carried out. The mechanism of phase transition at 38 K, consisting in the gradual ordering of Li+ sublattice, is proposed. The dependence of some physical characteristics on the rate of the cooling-heating cycle is discussed. |
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