Structural relaxation and quasi-elastic light scattering in glass: Approach by ferroelectric and ion-conducting phases

Yoshihiro Takahashi, Kensaku Nakamura, Minoru Osada, Takumi Fujiwara

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4 Citations (Scopus)

Abstract

Inelastic light scattering has been utilized for examining the structure of glass and its relaxation. However, the quasi-elastic-light-scattering (QLS) phenomenon has not been addressed in much detail. In this study, we observed pronounced QLS-intensity variations in two temperature domains-supercooled liquid (SCL) state (α-relaxation regime) and below the glass-transition temperature (β-relaxation regime)-in niobium-oxide (Nb 2O 5)-rich glass. These variations may be interpreted on the basis of the concept of ferroelectric and ion-conducting phases. It was suggested that the observed QLS originates as a result of the polarization fluctuation of NbO 6 units, which is due to the dynamics of the nanometric phase separation in the SCL phase (α-regime), and the fluctuation due to the migration/hopping of conductible ions that are localized in the vicinity of the NbO 6x units (β-regime).

Original languageEnglish
Article number714
JournalScientific Reports
Volume2
DOIs
Publication statusPublished - 2012
Externally publishedYes

ASJC Scopus subject areas

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