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Type: Artigo de periódico
Title: Pressure-induced Phase Transition In -liio3
Author: Lemos V.
Filho J.M.
Melo F.E.A.
Katiyar R.S.
Cerdeira F.
Abstract: We report the first observation of a pressure-induced phase transition in LiIO3. A new phase appears when -LiIO3 is compressed hydrostatically at room temperature, beyond 50 kbar. This is a reversible first-order transition with negligible hysteresis. The new phase -LiIO3 cannot be obtained by heating or cooling either - or -LiIO3 or by compressing the former. We observe the transition by studying the evolution of the Raman spectrum of -LiIO3 as a function of pressure (1 bar-95 kbar). We also report a detailed study of the pressure dependence of Raman frequencies for -LiIO3. The regularities observed in the mode-Gr̈neisen parameters and other pressure coefficients for thephase give insight into the probable structure of the high-pressure phase. © 1983 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.28.2985
Date Issue: 1983
Appears in Collections:Unicamp - Artigos e Outros Documentos

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