Phonon spectroscopy of the low-energy excitations in the solid solutions of yttrium–rare-earth metal–aluminum garnets

Journal Article · Wed Jul 15 00:00:00 EDT 2015 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776115060084· OSTI ID:22472200

Taranov, A. V. ^[1]; Shevchenko, E. V.; Charnaya, E. V. ^[2]

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1. Russian Academy of Sciences, Kotel’nikov Institute of Radio Engineering and Electronics (Russian Federation)
2. St. Petersburg State University (Russian Federation)

The transport characteristics of thermal-frequency phonons and the specific heat of a series of single crystals of yttrium–rare-earth metal–aluminum garnet solid solutions are studied at the helium temperatures. It is found that the existence of low-energy levels of various origins, which are responsible for an increase in the specific heat, retards phonon transport by one–three orders of magnitude. The temperature dependences of specific heat and the kinetic characteristics of phonons have a similar character.

• OSTI ID: 22472200
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 121, Issue 1; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINATES
ENERGY LEVELS
EXCITATION
GARNETS
MONOCRYSTALS
PHONONS
RARE EARTH COMPOUNDS
SOLID SOLUTIONS
SPECIFIC HEAT
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
YTTRIUM COMPOUNDS