Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Effect of vitrification suppression on non-linear conduction in vanadium phosphate glasses
Faculty
Science
Year:
1998
Type of Publication:
Article
Pages:
1581-1594
Authors:
SHASH, NM, El-Mansy, MK, Salman, FE, El-Sharawy, MG, Bayoumi, RM
Journal:
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS EDITRICE COMPOSITORI BOLOGNA
Volume:
20
Research Area:
Physics
ISSN
ISI:000077734000011
Keywords :
Effect , vitrification suppression , non-linear conduction , vanadium
Abstract:
The effects of both composition and creation of the crystalline phase in (V2O5)(1-x)(P2O5)(x) glasses, where x = 0.10, 0.15, 0.20 and 0.25, on both I-V characteristic curves and ac conductivity are studied in the temperature range 303-473 K. The I-V characteristics show non-linear behavior below and beyond a turnover point (switching point) characterizing these glasses. This turnover point is shifted towards lower voltage and higher current as the vanadium content, the ambient temperature or the degree of cystallinity in the glass were increased. The results are interpreted according to the Poole-Frenkel emission of electrons under high field between filled V4+ and empty V5+ sites in the region below the turnover point. The conduction in the negative-resistance region (beyond the turnover point) is discussed according to the hopping of electrons between filled and empty sites under high field, joule heating and self-generation of ac signal. The frequency dependence of the ac conductivity satisfies the power law relation, sigma(omega) similar or equal to omega(s), which explains the quantum-mechanical hopping of single electrons in the disordered matrix.
Online
PDF
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف