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2009 | 7 | 1 | 198-205
Tytuł artykułu

Ultrasonic wave propagation in rare-earth monochalcogenides

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The ultrasonic attenuation in thulium monochalcogenides TmX (X=S, Se and Te) has been studied theoretically with a modified Mason’s approach in the temperature and range 100 K to 300 K along 〈100〉, 〈110〉 〈111〉 crystallographic directions. The thulium monochalcogenides have attracted a lot of interest due to their complex physical and chemical characteristics. TmS, TmSe and TmTe are trivalent metal, mixed valence state, and divalent semiconductor, respectively. Coulomb and Born-Mayer potential is applied to evaluate the second- and third-order elastic constants. These elastic constants are used to compute ultrasonic parameters such as ultrasonic velocities, thermal relaxation time, and acoustic coupling constants that, in turn, are used to evaluate ultrasonic attenuation. A comparison of calculated ultrasonic parameters with available theoretical/experimental physical parameters gives information about classification of these materials.
Wydawca

Czasopismo
Rocznik
Tom
7
Numer
1
Strony
198-205
Opis fizyczny
Daty
wydano
2009-03-01
online
2009-01-08
Twórcy
autor
  • Department of Applied Physics, AMITY School of Engineering and Technology, Bijwasan, New Delhi, 110 061, India, dsingh1@aset.amity.edu
  • Department of Applied Physics, AMITY School of Engineering and Technology, Bijwasan, New Delhi, 110 061, India
  • Department of Applied Physics, AMITY School of Engineering and Technology, Bijwasan, New Delhi, 110 061, India
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-008-0130-1
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