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Ultrasonic and hype...
Ultrasonic and hypersonic behaviours of borate glasses
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Carini, Giovanni (författare)
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Tripodo, G. (författare)
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- Börjesson, Lars, 1957 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- Zanghellini, Ezio, 1962 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Bartolotta, A. (författare)
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visa färre...
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(creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Philosophical Magazine. - 1478-6435 .- 1478-6443. ; 87, s. 697-703
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- Comparative measurements of Brillouin light scattering and ultrasound in (K2O)0.04(B2O3)0.96 and (Ag2O)0.14(B2O3)0.86 borate glasses as a function of temperature between 1.5 and 300 K reveal that distinct mechanisms regulate the temperature behaviours of the acoustic attenuation. In the MHz range the attenuation and the sound velocity are mainly governed by (i) quantum-mechanical tunnelling below 20 K, (ii) thermally activated relaxations between 20 and 200 K and (iii) vibrational inharmonicity at even higher temperatures. In the GHz range and in the temperature interval between 77 and 300 K, additional contributions besides the relaxation process must be taken into consideration to account for the hypersonic attenuation.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Glasses
- Brillouin spectroscopy
- Ultrasonic spectroscopy
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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