Sequential hypersonic dampings due to fast ion diffusion and structural relaxation in (AgI)x(AgPO3)1-x ionic liquids

L. Borjesson; S. W. Martin; L. M. Torell; C. A. Angell

doi:10.1016/0167-2738(86)90101-3

Sequential hypersonic dampings due to fast ion diffusion and structural relaxation in (AgI)_x(AgPO₃)_1-x ionic liquids

L. Borjesson, S. W. Martin, L. M. Torell, C. A. Angell

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Abstract

We report the novel observations that in the liquid states of fast ion conducting glasses two independent relaxation processes can be distinguished by Brillouin scattering. Spectra of the (AgI)_x(AgPO₃)_1-x systems have been studied between x=0 and 0.5 and above 0.4 reveal two independent hypersonic phonon damping mechanisms attributed to structural relaxation and to Ag⁺ diffusion. With increasing AgI content, the absorption due to mobile Ag⁺ shifts to lower temperatures in accordance with conductivity relaxation time data. The results imply that we have observed for the first time the liquid state equivalent of the mobile cation internal friction peak well known from the lower frequency mechanical studies on other ion conducting glasses. The relaxation strength of the fast ion diffusion mode is found to be considerably smaller than that of structural relaxation.

Original language	English (US)
Pages (from-to)	141-146
Number of pages	6
Journal	Solid State Ionics
Volume	18-19
Issue number	PART 1
DOIs	https://doi.org/10.1016/0167-2738(86)90101-3
State	Published - Jan 1986
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Sequential hypersonic dampings due to fast ion diffusion and structural relaxation in (AgI)x(AgPO3)1-x ionic liquids",

abstract = "We report the novel observations that in the liquid states of fast ion conducting glasses two independent relaxation processes can be distinguished by Brillouin scattering. Spectra of the (AgI)x(AgPO3)1-x systems have been studied between x=0 and 0.5 and above 0.4 reveal two independent hypersonic phonon damping mechanisms attributed to structural relaxation and to Ag+ diffusion. With increasing AgI content, the absorption due to mobile Ag+ shifts to lower temperatures in accordance with conductivity relaxation time data. The results imply that we have observed for the first time the liquid state equivalent of the mobile cation internal friction peak well known from the lower frequency mechanical studies on other ion conducting glasses. The relaxation strength of the fast ion diffusion mode is found to be considerably smaller than that of structural relaxation.",

author = "L. Borjesson and Martin, {S. W.} and Torell, {L. M.} and Angell, {C. A.}",

note = "Funding Information: The authors gratefully acknowledge the preparation of the AgI doped glasses by J.P. Malugani and C. Lui (Purdue University). This program is supported by Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1986",

month = jan,

doi = "10.1016/0167-2738(86)90101-3",

language = "English (US)",

volume = "18-19",

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T1 - Sequential hypersonic dampings due to fast ion diffusion and structural relaxation in (AgI)x(AgPO3)1-x ionic liquids

AU - Borjesson, L.

AU - Martin, S. W.

AU - Torell, L. M.

AU - Angell, C. A.

N1 - Funding Information: The authors gratefully acknowledge the preparation of the AgI doped glasses by J.P. Malugani and C. Lui (Purdue University). This program is supported by Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1986/1

Y1 - 1986/1

N2 - We report the novel observations that in the liquid states of fast ion conducting glasses two independent relaxation processes can be distinguished by Brillouin scattering. Spectra of the (AgI)x(AgPO3)1-x systems have been studied between x=0 and 0.5 and above 0.4 reveal two independent hypersonic phonon damping mechanisms attributed to structural relaxation and to Ag+ diffusion. With increasing AgI content, the absorption due to mobile Ag+ shifts to lower temperatures in accordance with conductivity relaxation time data. The results imply that we have observed for the first time the liquid state equivalent of the mobile cation internal friction peak well known from the lower frequency mechanical studies on other ion conducting glasses. The relaxation strength of the fast ion diffusion mode is found to be considerably smaller than that of structural relaxation.

AB - We report the novel observations that in the liquid states of fast ion conducting glasses two independent relaxation processes can be distinguished by Brillouin scattering. Spectra of the (AgI)x(AgPO3)1-x systems have been studied between x=0 and 0.5 and above 0.4 reveal two independent hypersonic phonon damping mechanisms attributed to structural relaxation and to Ag+ diffusion. With increasing AgI content, the absorption due to mobile Ag+ shifts to lower temperatures in accordance with conductivity relaxation time data. The results imply that we have observed for the first time the liquid state equivalent of the mobile cation internal friction peak well known from the lower frequency mechanical studies on other ion conducting glasses. The relaxation strength of the fast ion diffusion mode is found to be considerably smaller than that of structural relaxation.

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Sequential hypersonic dampings due to fast ion diffusion and structural relaxation in (AgI)_x(AgPO₃)_1-x ionic liquids

Abstract

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