کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1808532 1525168 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A.C. conduction in glassy alloys of Se90Sb10-xAgx
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
A.C. conduction in glassy alloys of Se90Sb10-xAgx
چکیده انگلیسی

Temperature and frequency dependence of a.c. conductivity is studied in glassy Se90Sb10-xAgx (x=2, 4, 6 and 8) in the temperature range (288–358 K) and frequency range (1–500 kHz). An agreement between experimental and theoretical results suggests that the behavior of glassy Se–Sb–Ag system can be successfully explained by correlated barrier hopping (CBH) model. The results show that bipolaron hopping dominates over single polaron hopping in present case, which is explained in terms of lower value of potential barrier. By fitting the experimental data to CBH model, the density of charged defect states is calculated for all the glasses studied. The composition dependence of the density of these states is studied and found to show a maxima at 6 at% of Ag which is explained in terms of the mechanically stabilized structure at a particular average co-ordination number.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 481, 15 January 2016, Pages 144–147
نویسندگان
, , ,