Anomalous boson behavior and nanometric heterogeneity in glassy fresnoite

Yoshihiro Takahashi; Minoru Osada; Hirokazu Masai; Takumi Fujiwara

doi:10.1143/APEX.1.121901

Anomalous boson behavior and nanometric heterogeneity in glassy fresnoite

Yoshihiro Takahashi^*, Minoru Osada, Hirokazu Masai, Takumi Fujiwara

^*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

In-situ observation of the boson peak, ω_BP, of as-quenched and annealed glassy Ba₂TiGe₂O₈ (BTG) and Ba₂TiSi₂O₈ (BTS) was performed during a heating process. Although annealed glassy BTG and BTS indicated a monotonous decrease in ω_BP with temperature, the as-quenched varieties, which Included internal stress, revealed anomalous boson behavior at ∼600°C, lower than each one's glass-transition temperature. It was suggested that the ω_BP anomaly was caused by β-relaxation. This experimental result also supports the inhomogeneous structure (or cluster) model of glass.

Original language	English
Pages (from-to)	1219011-1219013
Number of pages	3
Journal	Applied Physics Express
Volume	1
Issue number	12
DOIs	https://doi.org/10.1143/APEX.1.121901
Publication status	Published - 2008 Dec
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Anomalous boson behavior and nanometric heterogeneity in glassy fresnoite",

abstract = "In-situ observation of the boson peak, ωBP, of as-quenched and annealed glassy Ba2TiGe2O8 (BTG) and Ba2TiSi2O8 (BTS) was performed during a heating process. Although annealed glassy BTG and BTS indicated a monotonous decrease in ωBP with temperature, the as-quenched varieties, which Included internal stress, revealed anomalous boson behavior at ∼600°C, lower than each one's glass-transition temperature. It was suggested that the ωBP anomaly was caused by β-relaxation. This experimental result also supports the inhomogeneous structure (or cluster) model of glass.",

author = "Yoshihiro Takahashi and Minoru Osada and Hirokazu Masai and Takumi Fujiwara",

year = "2008",

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doi = "10.1143/APEX.1.121901",

language = "English",

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journal = "Applied Physics Express",

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T1 - Anomalous boson behavior and nanometric heterogeneity in glassy fresnoite

AU - Takahashi, Yoshihiro

AU - Osada, Minoru

AU - Masai, Hirokazu

AU - Fujiwara, Takumi

PY - 2008/12

Y1 - 2008/12

N2 - In-situ observation of the boson peak, ωBP, of as-quenched and annealed glassy Ba2TiGe2O8 (BTG) and Ba2TiSi2O8 (BTS) was performed during a heating process. Although annealed glassy BTG and BTS indicated a monotonous decrease in ωBP with temperature, the as-quenched varieties, which Included internal stress, revealed anomalous boson behavior at ∼600°C, lower than each one's glass-transition temperature. It was suggested that the ωBP anomaly was caused by β-relaxation. This experimental result also supports the inhomogeneous structure (or cluster) model of glass.

AB - In-situ observation of the boson peak, ωBP, of as-quenched and annealed glassy Ba2TiGe2O8 (BTG) and Ba2TiSi2O8 (BTS) was performed during a heating process. Although annealed glassy BTG and BTS indicated a monotonous decrease in ωBP with temperature, the as-quenched varieties, which Included internal stress, revealed anomalous boson behavior at ∼600°C, lower than each one's glass-transition temperature. It was suggested that the ωBP anomaly was caused by β-relaxation. This experimental result also supports the inhomogeneous structure (or cluster) model of glass.

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JO - Applied Physics Express

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Anomalous boson behavior and nanometric heterogeneity in glassy fresnoite

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