Phonon attenuation in amorphous solids studied by picosecond ultrasonics

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.203· OSTI ID:285619

Morath, C J; Maris, H J ^[1]

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1. Department of Physics, Brown University, Providence, Rhode Island 02912 (United States)

We have used a picosecond optical technique to measure the attenuation {alpha} of longitudinal-acoustic phonons in several disordered solids. We find a universal {alpha}{approximately}{nu}{sup 2} behavior for frequencies {nu} up to 320 GHz and for temperatures between 80 and 300 K. Within this temperature range the phonon attenuation increases by a factor of between 2 and 3 with increasing temperature for the amorphous polymers poly(methyl methacrylate), poly(styrene), and poly(ethyl methacrylate), and for the metallic glass TiNi. We discuss our results in relation to current theories of high-frequency vibrations in glasses and thermal conduction. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG02-86ER45267
• OSTI ID: 285619
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
ATTENUATION
PHONONS
PMMA
POLYSTYRENE
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
TITANIUM NITRIDES
ULTRASONIC TESTING
VIBRATIONAL STATES