The magnetic properties and electrical conduction mechanism of Co1-xMnxFe2O4 spinel

Citation
Dh. Lee et al., The magnetic properties and electrical conduction mechanism of Co1-xMnxFe2O4 spinel, MATER CH PH, 57(2), 1998, pp. 169-172
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS CHEMISTRY AND PHYSICS
ISSN journal
02540584 → ACNP
Volume
57
Issue
2
Year of publication
1998
Pages
169 - 172
Database
ISI
SICI code
0254-0584(199812)57:2<169:TMPAEC>2.0.ZU;2-M
Abstract
Co1-xMnxFe2O4 spinels were synthesized at 1080 degrees C in air as bulk pha ses. The lattice parameters increase with the addition of Mn cation, which is closely related to the effective substitution of Mn2+ cation. From the m easurements of the magnetic moment, it is shown that Mn contributes to the canted magnetic moment between tetrahedral (A) and octahedral (B) sites, ex cept for the sample with x = 0.2. The n-type conduction was observed from S eebeck coefficient measurements: this is ascribed the formation of Co3+ + e (-) and Mn3+ + e(-) from Co2+ and Mn2+ cations on A and B sites. The electr ical conductivities increase with Mn substitution. It is suggested that the possibility of charge transfer between 2+ and 3+ cation in A as well as B sites may contribute to electrical conductivity. (C) 1998 Elsevier Science S.A. All rights reserved.