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Ionic Motion and Structure of Ion Conductive Glasses

Published online by Cambridge University Press:  15 February 2011

T. Akai
Affiliation:
Optical Material Department, Osaka National Research Institute, AIST* 1–8–31, Midorigaoka, Ikeda, 563, Japan.
M. Yamashita
Affiliation:
Optical Material Department, Osaka National Research Institute, AIST* 1–8–31, Midorigaoka, Ikeda, 563, Japan.
H. Yamanaka
Affiliation:
Optical Material Department, Osaka National Research Institute, AIST* 1–8–31, Midorigaoka, Ikeda, 563, Japan.
H. Wakabayashi
Affiliation:
Optical Material Department, Osaka National Research Institute, AIST* 1–8–31, Midorigaoka, Ikeda, 563, Japan.
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Abstract

The dynamic structure of xLi2S-Ga2S3-6GeS2 (x=4 and 6) glasses has been investigated by 7Li nuclear magnetic resonance. In two samples similar values of spin-lattice relaxation time (T1) were obtained. The relaxation mechanism at 20MHz and 78MHz is therefore attributed to the local motion of lithium ions. In the glass corresponding to x=6, which shows higher conductivity, the slow motion of ions showing an activation energy of 24.3kJ/Mol has been detected by the spin-lattice relaxation time in the rotating frame (T1p). This value is comparable to the activation energy determined by the conductivity. The existence of this mode is supported by the motional narrowing of the line width which is sensitive to the motion less than 10kHz.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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