کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8162896 | 1525212 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dielectric and impedance spectral characteristics of bulk ZnIn2Se4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dielectric and impedance spectral characteristics of bulk ZnIn2Se4 Dielectric and impedance spectral characteristics of bulk ZnIn2Se4](/preview/png/8162896.png)
چکیده انگلیسی
The frequency and temperature dependence of ac conductivity, dielectric constant and dielectric loss of ZnIn2Se4 in a pellet form were investigated in the frequency range of 102-106Â Hz and temperature range of 293-356Â K. The behavior of ac conductivity was interpreted by the correlated barrier hopping (CBH) model. Temperature dependence of ac conductivity indicates that ac conduction is a thermally activated process. The density of localized states N(EF) and ac activation energy were estimated for various frequencies. Dielectric constant and dielectric loss showed a decrease with increasing frequency and an increase with increasing in temperature. The frequency dependence of real and imaginary parts of the complex impedance was investigated. The relaxation time decreases with the increase in temperature. The impedance spectrum exhibits the appearance of the single semicircular arc. The radius of semicircular arcs decreases with increasing temperature which suggests a mechanism of temperature-dependent on relaxation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 434, 1 February 2014, Pages 89-94
Journal: Physica B: Condensed Matter - Volume 434, 1 February 2014, Pages 89-94
نویسندگان
M.M. El-Nahass, A.A. Attia, G.F. Salem, H.A.M. Ali, M.I. Ismail,