Low energy vibrational excitations characteristic of superionic glass

Nakamura, Mitsutaka ; Iwase, Hiroki; Arai, Masatoshi; Kartini, E.*; Russina, M.*; Yokoo, Tetsuya*; Taylor, J. W.*

The mechanism of high ionic conductivity in superionic glass constitute an unsolved problem in the field of science.Here we performed inelastic neutron scattering measurements of superionic glass system (AgI) $_{x}$ (Ag $_{2}$ S) $_{x}$ (AgPO $_{3}$ ) $_{1-2x}$ by using MARI spectrometer at ISIS, and found that the -dependence of inelastic intensity in the energy region from 1 to 3 meV of superionic phase glass shows an excess intensity above =1.8 $AA$^{-1}$$ compared with insulator phase one. Similar phenomena were also observed in another superionic glass (AgI) $_{0.5}$ (AgPO $_{3}$ ) $_{0.5}$ by using NEAT spectrometer at HMI with high resolution measurement. These results clearly suggest peculiar low energy vibrational excitations should be universal features of superionic glass.

Language	:	English
Journal	:	Physica B; Condensed Matter
Volume	:	385-386
Number	:	1
Pages	:	p.552 - 554
Publication Year/Month	:	2006/11
Meeting title	:	8th International Conference on Neutron Scattering (ICNS 2005)
Held date	:	2005/11
Location (city)	:	Sydney
Location (country)	:	Australia
Patent information	:
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Paper URL	:	https://doi.org/10.1016/j.physb.2006.05.274
DOI for research data	:
Keywords	:	no keyword
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Registration No. : BB20050278
JAEA Abstracts No. : 35000172
Paper Submission No. : 1724

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