THE DIFFUSION-COEFFICIENT OF VACANCIES AND JUMP LENGTH OF ELECTRONS IN ZINC-DOPED MANGANESE FERRITE

Authors
TAWFIK A OLOFA SA
Citation
A. Tawfik et Sa. Olofa, THE DIFFUSION-COEFFICIENT OF VACANCIES AND JUMP LENGTH OF ELECTRONS IN ZINC-DOPED MANGANESE FERRITE, Journal of magnetism and magnetic materials, 174(1-2), 1997, pp. 133-136
Citations number
8
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
174
Issue
1-2
Year of publication
1997
Pages
133 - 136
Database
ISI
SICI code
0304-8853(1997)174:1-2<133:TDOVAJ>2.0.ZU;2-A
Abstract
Samples of mixed ferrite Mn1-xZnxFe2O4 (x = 0.0, 0.1, 0.3, 0.5 and 0.7 ) have been prepared by the usual ceramic technique. X-ray diffraction patterns confirmed the spinel cubic structure for the samples. The ju mp length of electrons in the octahedral sites and electrical conducti vity were studied as a function of zinc concentration. The increase of the jump length with Zn concentration is attributed to the substituti on of Fe3+ for Zn2+ at the A sites which increase the B-B interaction. The increase of the diffusion coefficient and jump rate of vacancies with increasing Zn concentration expedite densification of the samples during sintering.