Main Page
About Science
Faculty Deanship
Letter of Dean
Overview of Deanship
Vice Deans
Vice Dean
Letter of Vice-dean
Overview of Vice-deanship
Vice Dean for Graduate Studies
Letter of Vice Dean for Graduate Studies
Overview of Vice Dean of Postgraduate Studies
Research and Innovation Unit
Vice Dean for Girls Campus
Faculty Management
Letter of Managing Director-Boys Campus
Letter of Managing Director-Girls Campus
Overview of Management
Educational Affairs
Males Campus
Staff
Females Campus
Contact Us
Research
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
IR spectra and dielectric properties of Cu-Ge ferrite
IR spectra and dielectric properties of Cu-Ge ferrite
Subject
:
Physics
Document Language
:
English
Abstract
:
The mixed ferrite Cu1+xGexFe2-2xO 4; where x = 0.0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3; was prepared from high purity oxides using the standard ceramic technique. The IR spectra were recorded on the range from 200 to 1000 cm-1. The two primary bands corresponding to tetrahedral νA and octahedral νB were observed around 575 cm-1 and 400 cm -1, respectively. It was found the threshold frequency νth for the electronic transition increases with increasing the Ge content. The Debye's temperature θD was calculated and it was found dependent on the type of charge carriers. AC conductivity σac with dielectric properties (dielectric constant ε′, dielectric loss ε″ and loss tangent tan δ) as a function of frequency (f = 102 → 106 Hz) at room temperature have been measured. The dispersion of the dielectric properties was discussed in the light of Koop's phenomenological theory. The phonon frequency νph which calculated from IR spectra for each composition of Cu-Ge ferrite was found to be higher than that calculated from the AC conductivity by a factor of about 104-105 Hz.
ISSN
:
0254-0584
Journal Name
:
Materials Chemistry and Physics
Volume
:
130
Issue Number
:
3
Publishing Year
:
1432 AH
2011 AD
Article Type
:
Article
Added Date
:
Monday, April 9, 2012
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
Said A Mazen
Mazen, Said A
Researcher
Doctorate
dr.saidmazen@gmail.com
علي محمد عبدالدايم
Abdel Daiem, Ali Mohamed
Researcher
Doctorate
abdeldaiem@hotmail.com
Files
File Name
Type
Description
32798.pdf
pdf
Abstract
Back To Researches Page