Heat Capacity and Features of the Phonon Spectrum of Single Crystals of Solid Solutions of Yttrium-Lutetium Alumogranates-Reference-Cited by-同舟云学术

Heat Capacity and Features of the Phonon Spectrum of Single Crystals of Solid Solutions of Yttrium-Lutetium Alumogranates

Published:2024-08-15 Issue:2 Volume:70 Page:180-185
ISSN:0320-7919
Container-title:Акустический журнал
language:
Short-container-title:Akustičeskij žurnal

Author:

Nikitov S. A.¹,Taranov A. V.¹,Khazanov E. N.¹,Charnaya E. V.²,Likholetova M. V.²,Shevchenko E. V.²

Affiliation:

1. Institute of Radio Engineering and Electronics named after V.A. Kotelnikov, Russian Academy of Sciences

2. St. Petersburg State University

Abstract

The temperature dependences of the heat capacity were measured and the general patterns of the formation of the phonon spectrum of single crystals of solid solutions of yttrium-lutetium aluminum garnets Y3–xLuxAl5O12 at 0 x 3 were studied in the temperature range from 1.9 to 220 K. Based on the data obtained below 10 K, the Debye temperatures were calculated. Features of the phonon spectrum in the intermediate temperature region are interpreted as a superposition of optical modes for yttrium and lutetium garnets. It is shown that low values of the heat capacity due to the contribution of acoustic phonons for Y2.25Lu0.75Al5O12 correlate with anomalies in the concentration dependences of phonon transport, absorption of acoustic waves, and the NMR line shape of aluminum.

Publisher

The Russian Academy of Sciences

Reference27 articles.

1. Каминский А.А. Лазерные кристаллы. М.: Наука, 1975.

2. Каминский А.А., Таранов А.В., Хазанов Е.Н., Акчурин М.Ш. Особенности структуры диэлектрических лазерных оксидных керамик // Квантовая электроника. 2012. Т. 42. С. 880–886.

3. Kuz’mints M.D., Tishin A.M. Magnetic refrigerants for the 4.2–20 K region: garnets or perovskites? // J. Phys. D: Appl. Phys. 1991. V. 24. P. 2039–2044.

4. Ivanov S.N. The Use of Yttrium-Rare Earth Aluminium Garnet Solid Solutions for Bulk-Acoustic-Wave (BAW) Devices // IEEE Trans. Ultrason. Ferroelectr. Freq. Control. 1992. V. 39. P. 653–656.

5. Hickernell F.S. -3- Surface acoustic wave technology macrosuccess through microseisms, Physical Acoustics. Academic Press, 1999. V. 24. P. 135–207.