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The effect of zinc concentration on vacancies jump rate, diffusion coefficient and jump length in Cu-Zn ferrite
Faculty
Science
Year:
2009
Type of Publication:
Article
Pages:
889-892
Authors:
Zaki, H. M
DOI:
10.1016/j.jpcs.2009.04.014
Journal:
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS PERGAMON-ELSEVIER SCIENCE LTD
Volume:
70
Research Area:
Chemistry; Physics
ISSN
ISI:000267711900016
Keywords :
Ceramics, Chemical synthesis, Infrared spectroscopy, Dielectric properties
Abstract:
Samples with the chemical formula Cu(1-x)Zn(x)Fe(2)O(4) (x = 0.2, 0.4, 0.6, 0.8 and 1) were prepared by the standard ceramic method. The dielectric constant and dielectric loss tangent were studied as a function of vacancy jump rate. The results show that the dielectric constant and dielectric loss tangent decrease with increasing vacancy jump rate. In addition, the electron jump length in the octahedral sites was studied as a function of zinc concentration. The increase in jump length with Zn concentration has been attributed to the substitution of Fe(+3) for Zn(2+) at the A-sites, which increases the B-B interaction. The increase of diffusion coefficient with increasing Zn concentration was reinforced by the increase of jump rate. (C) 2009 Elsevier Ltd. All rights reserved.
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