Archives of Acoustics, 34, 4, pp. 715-725, 2009

Ultrasonic Characterization of Bi2(Te1-xSex)3 System

Mohamed El-Sayed GAAFAR
Ultrasonic Laboratory, National Institute for Standards

Laila Ibrahim SOLIMAN
Solid State Physics Department, National Research Center

Samir Yousuf MARZOUK
Arab Academy of Science and Technology

Longitudinal and shear ultrasonic wave velocities were
measured in the ternary compounds B2(Te1-xSex)3 (0[ampersand]le;x[ampersand]le;1), using pulse echo
technique. Measurements were carried out at 4MHz frequency and at room
temperature. Elastic moduli and acoustic impedance have been calculated. The
results indicate that these parameters are influenced by the increased addition
of selenium from x=0 to 1.
Keywords: polycrystalline materials; Bi-Te-Se systems; ultrasonic wave velocity; elastic properties
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