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2010 | 8 | 6 | 905-914
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Acoustic attenuation in ferroelectric Sn2P2S6 crystals

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The temperature and frequency dependencies of sound attenuation for the proper uniaxial ferroelectric Sn2P2S6, which has a strong nonlinear interaction of the polar soft optic and fully symmetrical optic modes that is related to the triple well potential, were studied by Brillouin spectroscopy. It was found that the sound velocity anomaly is described in the Landau-Khalatnikov approximation with one relaxation time. For explanation of the observed temperature and frequency dependencies of the sound attenuation in the ferroelectrric phase, the accounting of several relaxation times is needed and, for quantitative calculations, the mode Gruneisen coefficients are more appropriate as interacting parameters than are the electrostrictive coefficients. Relaxational sound attenuation by domain walls also appears in the ferroelectric phase of Sn2P2S6 crystals.
Wydawca
Czasopismo
Rocznik
Tom
8
Numer
6
Strony
905-914
Opis fizyczny
Daty
wydano
2010-12-01
online
2010-09-05
Twórcy
  • Institute for Physics and Chemistry of Solid State, Uzhgorod National University, Pidgirna Str. 46, Uzhgorod, 88000, Ukraine
  • Institute for Physics and Chemistry of Solid State, Uzhgorod National University, Pidgirna Str. 46, Uzhgorod, 88000, Ukraine
  • Institute for Physics and Chemistry of Solid State, Uzhgorod National University, Pidgirna Str. 46, Uzhgorod, 88000, Ukraine
  • Institute for Physics and Chemistry of Solid State, Uzhgorod National University, Pidgirna Str. 46, Uzhgorod, 88000, Ukraine , vysochanskii@univ.uzhgorod.ua
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-010-0016-x
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