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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2003, Volume 78, Issue 2, Pages 95–98 (Mi jetpl2496)  
This article is cited in 1 scientific paper (total in 1 paper)

Anomalous behavior of the velocity of hypersonic acoustic phonons in (NH$_4)_3$H(SO$_4)_2$ crystals

S. G. Lushnikova, A. I. Fedoseeva, L. A. Shuvalovb, H. Shmidtc

a Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg
b Institute of Cristallography Russian Academy of Sciences, Moscow
c Montana State University
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Abstract: The velocity of quasi-longitudinal acoustic (QLA) phonons in (NH$_4)_3$H(SO$_4)_2$ (TAHS) crystals was studied by Brillouin scattering in the temperature range from 295 to 430 K. It was found that the QLA phonon velocity in the vicinity of a superionic ferroelastic phase transition ($T_c=413\,$K) exhibits anomalous temperature dependence. At $T<T_c$, an additional contribution is separated from the temperature dependence of the hypersound velocity, the behavior of which is correlated with variations of the conductivity of a TAHS crystal. Based on an analysis of the experimental data, a thermoactivation mechanism explaining the anomalous behavior of the QLA phonon velocity is proposed and the corresponding activation energy is estimated.
Received: 24.06.2003
English version:
Journal of Experimental and Theoretical Physics Letters, 2003, Volume 78, Issue 2, Pages 84–87
DOI: https://doi.org/10.1134/1.1615535
Bibliographic databases:
Document Type: Article
PACS: 63.20.-e, 64.60.Ht, 78.35.+c
Language: Russian
Citation: S. G. Lushnikov, A. I. Fedoseev, L. A. Shuvalov, H. Shmidt, “Anomalous behavior of the velocity of hypersonic acoustic phonons in (NH$_4)_3$H(SO$_4)_2$ crystals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 78:2 (2003), 95–98; JETP Letters, 78:2 (2003), 84–87
Citation in format AMSBIB
\Bibitem{LusFedShu03}
\by S.~G.~Lushnikov, A.~I.~Fedoseev, L.~A.~Shuvalov, H.~Shmidt
\paper Anomalous behavior of the velocity of hypersonic acoustic phonons in (NH$_4)_3$H(SO$_4)_2$ crystals
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2003
\vol 78
\issue 2
\pages 95--98
\mathnet{http://mi.mathnet.ru/jetpl2496}
\transl
\jour JETP Letters
\yr 2003
\vol 78
\issue 2
\pages 84--87
\crossref{https://doi.org/10.1134/1.1615535}
\scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-20444450083}
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  • https://www.mathnet.ru/eng/jetpl/v78/i2/p95
    • This publication is cited in the following 1 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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    		Письма в Журнал экспериментальной и теоретической физики Pis'ma v Zhurnal Иksperimental'noi i Teoreticheskoi Fiziki
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