Ultrasonic Attenuation in Alloys

Kor, S. K.; Singh, Ramesh

doi:10.12693/aphyspola.83.751

Cited by 11 publications

(7 citation statements)

References 5 publications

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“…This type of behavior has been found in other NaCl-type materials [17][18][19] . It is also found that values of C 111 , C 112 , and C 166 are negative, which is the same nature as in like materials [17][18][19][20][21][22] . *longitudinal wave along <100> direction, # longitudinal wave along <110> direction, $ longitudinal wave along <111> direction.…”

Section: Second and Third Order Elastic Constants (Soec And Toec)supporting

confidence: 52%

Temperature Dependent Ultrasonic Study in Scandium Antimonide Semiconductor

Gupta

Srivastava

Thapa

2011

Journal of Chemistry

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In this paper analysis of wave propagation of elastic wave in scandium antimonide semiconductor was investigated. In scandium antimonide semiconductor, NaCl structure was found. Ultrasonic properties like ultrasonic attenuation, sound velocities, acoustic coupling constants, and thermal relaxation time have been investigated in cubic scandium antimonide semiconductor. Second and third order elastic constant have been computed for the evaluation of above said ultrasonic properties. Second and third elastic constant was studied at the various temperatures. Longitudinal and shear velocity was calculated by using the elastic constant. Longitudinal and shear velocity increase with increase the temperature. Ultrasonic attenuation either from longitudinal or shear wave propagation in cubic materials increase with increase the temperature.

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Section: Second and Third Order Elastic Constants (Soec And Toec)supporting

confidence: 52%

Temperature Dependent Ultrasonic Study in Scandium Antimonide Semiconductor

Gupta

Srivastava

Thapa

2011

Journal of Chemistry

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“…The order of τ for dielectrics [33], semiconductors [12,34], metals [35], and intermetallics [11,14] direction), while the / 2 L values are found to be less than those of / 2 S along the 110 direction (polarized along the 110 direction) and the 111 direction (polarized along the 1 10 direction). Such properties of attenuation due to phonon-phonon interaction were also found in metals [35], intermetallics [11,14], semiconductors [12,37,38], and dielectrics [36,39]. Ultrasonic attenuation due to thermoelastic loss / 2 T is negligible in comparison to attenuation over frequency square due to phonon-phonon interaction in all the thulium monochalcogenides.…”

Section: Resultsmentioning

confidence: 94%

Ultrasonic wave propagation in rare-earth monochalcogenides

Singh¹,

Pandey²,

Yadawa³

2009

Open Physics

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Abstract: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 range 100 K to 300 K along 100 , 110 and 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.

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“…In view of its simplicity, it appears to be reasonably successful in explaining the basic features of materials. The versatility of this model is further witnessed from its successful applications to explain the semiconducting behaviour [33], nonlinear properties as variation of temperature [1,3,21,34] acoustical parameters of solids [5,19,32,33,35], etc. The theoretical predictions generally show good agreement with measured data for almost all of them.…”

Section: Resultsmentioning

confidence: 99%

Temperature Dependent Anharmonic Properties of Lead Chalcogenides

Raju

2010

Acta Phys. Pol. A

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Calculations were made to investigate the anharmonic properties of lead chalcogenides PbS, PbSe and PbTe at elevated temperatures by means of primary physical parameters viz. nearest-neighbour distance and hardness parameter using long-and short-range potentials. Higher-order elastic constants are computed up to their melting temperature for these crystals. The first order pressure derivatives of second-and third-order elastic constants, the second-order pressure derivatives of second-order elastic constants and partial contractions are also evaluated at different temperatures. As the experimental elastic constants are not available at high temperatures, hence our results were only compared with the available values obtained at room temperature. The nature of the elastic behaviour in these compounds was analyzed.

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Ultrasonic Attenuation in Alloys

Cited by 11 publications

References 5 publications

Temperature Dependent Ultrasonic Study in Scandium Antimonide Semiconductor

Temperature Dependent Ultrasonic Study in Scandium Antimonide Semiconductor

Ultrasonic wave propagation in rare-earth monochalcogenides

Temperature Dependent Anharmonic Properties of Lead Chalcogenides

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