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

Yoshihiro Takahashi; Kensaku Nakamura; Minoru Osada; Takumi Fujiwara

doi:10.1038/srep00714

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

Yoshihiro Takahashi, Kensaku Nakamura, Minoru Osada, Takumi Fujiwara

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

5 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 language	English
Article number	714
Journal	Scientific Reports
Volume	2
DOIs	https://doi.org/10.1038/srep00714
Publication status	Published - 2012

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10.1038/srep00714

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@article{b53107c62a0342bca0664c72b685b1b0,

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

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).",

author = "Yoshihiro Takahashi and Kensaku Nakamura and Minoru Osada and Takumi Fujiwara",

note = "Funding Information: This work was supported by the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government. The authors would like to thank Mr. Nobuhiro Fujie of the Department of Applied Physics, Graduate School of Engineering, Tohoku University, for providing the test sample. Dr. Takamichi Miyazaki of the Department of Instrumental Analysis, School of Engineering, Tohoku University and Dr. Kiyotaka Iiyama of the International Center for Materials Nanoarchitectonics, National Institute for Materials Science significantly contributed to this study.",

year = "2012",

doi = "10.1038/srep00714",

language = "English",

volume = "2",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Structural relaxation and quasi-elastic light scattering in glass

T2 - Approach by ferroelectric and ion-conducting phases

AU - Takahashi, Yoshihiro

AU - Nakamura, Kensaku

AU - Osada, Minoru

AU - Fujiwara, Takumi

N1 - Funding Information: This work was supported by the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government. The authors would like to thank Mr. Nobuhiro Fujie of the Department of Applied Physics, Graduate School of Engineering, Tohoku University, for providing the test sample. Dr. Takamichi Miyazaki of the Department of Instrumental Analysis, School of Engineering, Tohoku University and Dr. Kiyotaka Iiyama of the International Center for Materials Nanoarchitectonics, National Institute for Materials Science significantly contributed to this study.

PY - 2012

Y1 - 2012

N2 - 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).

AB - 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).

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

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