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Boson peak and structural heterogeneity in ternary SiO 2 ‐Al 2 O 3 ‐B 2 O 3 glasses
Author(s) -
Ando Mariana Fatobene,
Fuhrmann Sindy,
Pan Zhiwen,
Rodrigues Bruno Poletto,
Mori Tatsuya,
Ebbinghaus Stefan G.,
Wondraczek Katrin,
Kitani Suguru,
Wondraczek Lothar
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17771
Subject(s) - ternary operation , analytical chemistry (journal) , dopant , raman spectroscopy , dissolution , materials science , thermal stability , spectroscopy , raman scattering , crystallography , chemistry , doping , physics , optics , computer science , programming language , optoelectronics , organic chemistry , chromatography , quantum mechanics
We use low‐temperature heat capacity, low‐frequency Raman scattering, and THz time domain spectroscopy in order to scale the vibrational density of states and the Boson peak in SiO 2 ‐Al 2 O 3 ‐B 2 O 3 Yb‐laser host glasses. When substituting B 2 O 3 for SiO 2 at constant Al 2 O 3 dopant level, we find an optimal value for the ratio of B/Al in terms of mixture stability, at which the excess in the electron donor capability of Al 2 O 3 (relative to the SiO 2 backbone) is compensated by the more acidic B 2 O 3 . At this composition, Al 2 O 3 plays a mediating role in the structure of aluminoborosilicate glasses, facilitating dissolution of Yb 2 O 3 and admixture of B 2 O 3 into the SiO 2 network.