Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/9605
Title: Dielectric relaxation studies of (Ge<sub>20</sub>Se<sub>80</sub>)<sub>0.90</sub>Sn<sub>0.10</sub> glassy alloy
Authors: Chandel, Pradeep S
Thakur, Anup
Sharma, Vineet
Goyal, N
Tripathi, S K
Keywords: Dielectric relaxation
Glassy alloy
AC conductivity
Issue Date: Jul-2004
Publisher: CSIR
Series/Report no.: C 22 C
Abstract: The frequency and temperature dependence of ac conductivity measurements have been made on (Ge<sub>20</sub>Se<sub>80</sub>)<sub>0.90</sub>Sn<sub>0.10</sub> glassy alloy in the frequency range 2-50 kHz and in the temperature range 273-373K. Dielectric constant (<img src='/image/spc_char/italics_e.gif' border=0>') has been calculated using this data. The results indicate that dielectric dispersion occurs in this temperature and frequency range. The dielectric loss (<img src='/image/spc_char/italics_e.gif' border=0>'') and loss angle (tan<img src='/image/spc_char/delta1.gif' border=0>) have been calculated using Gever’s relation. The temperature dependence of dielectric loss (<img src='/image/spc_char/italics_e.gif' border=0>'') shows relaxation peaks as a function of temperature. These relaxation peaks shift towards the higher temperature as the frequency is increased. A detailed analysis of the data shows that the results can be explained in terms of dipolar relaxation with a distribution of relaxation times, which is quite expected in case of chalcogenide glasses.
Description: 539-543
URI: http://hdl.handle.net/123456789/9605
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.42(07) [July 2004]

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