Autor: Kor, S. K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Acoustical Dissipation in Some Tetrahedrally-Bonded Semiconducting Compounds
Autorzy:: Kor, S. K.
Mehrotra, P.
Powiązania:: https://bibliotekanauki.pl/articles/1933450.pdf
Data publikacji:: 1995-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.65.+k
62.20.-x
62.80.+f
Opis:: Phonon-phonon coupling and thermoelastic relaxation are the principal thermal causes of ultrasonic attenuation in solids at room temperature. Second order elastic moduli and third order elastic moduli have been used to study the ultrasonic attenuation suffered by compressional and shear acoustic waves for some tetrahedrally bonded semiconducting materials, viz. GaP, InP and InAs along ⟨100⟩, ⟨110⟩ and ⟨111⟩ crystallographic directions. Attenuation in case of InP is found to be quite large as compared to GaP and InAs. The reason behind this discrepancy is due to doping of Cr in InP sample and it is also seen that ultrasonic attenuation due to phonon-phonon interaction dominates over that due to thermoelastic relaxation.
Źródło:: Acta Physica Polonica A; 1995, 87, 6; 981-983
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Ultrasonic Attenuation in Binary Alloys
Autorzy:: Kor, S. K.
Pandey, G.
Powiązania:: https://bibliotekanauki.pl/articles/1968853.pdf
Data publikacji:: 1998-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.Dc
62.65.+k
62.80.+f
Opis:: An attempt was made to study the ultrasonic attenuation in Cu-Zn, Ag-Cd, Ag-Mg and Ag-Zn alloys, due to phonon-phonon interaction at 300 K. The Morse potential was used to evaluate the second and third order elastic constants. How far the neighbouring atoms are effective and contributing to ultrasonic attenuation was studied. It is concluded that most of the ultrasonic attenuation is covered by the atoms from 1st to 8th shell. The contribution to ultrasonic attenuation due to 9th shell to 12th shell is very small. It is also concluded that alloys behave more or less in the same manner as metals.
Źródło:: Acta Physica Polonica A; 1998, 93, 3; 491-497
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Ultrasonic Attenuation in Alloys
Autorzy:: Kor, S. K.
Singh, R. K.
Powiązania:: https://bibliotekanauki.pl/articles/1929339.pdf
Data publikacji:: 1993-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.Dc
62.65.+k
Opis:: Ultrasonic attenuation was evaluated in metallic alloys, Ni$\text{}_{x}$Cu$\text{}_{1-x}$ (x = 1.00, 0.70, 0.60, 0.45 and 0) due to phonon-phonon (p-p) interaction and thermoelastic loss in a wide temperature region along ⟨110⟩ crystallographic direction for longitudinal and shear waves. Ultrasonic Grüneisen parameters, nonlinearity constants and ultrasonic attenuation due to p-p interaction and thermoelastic loss were determined from 50 K to 500 K using the Born-Mayer and electrostatic potentials. The results were compared with available experimental results.
Źródło:: Acta Physica Polonica A; 1993, 83, 6; 751-758
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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