Thermopower analysis of substituted nickel manganite spinels

Information about the distribution of cations between tetrahedral (A) and octahedral (B) sites in the spinel structure of NiMn 2O 4 and some substituted spinel phases are derived from thermopower measurements in connection with some ion distribution models. The cubic spinel NiMn 2O 4 is characterize...

Full description

Saved in:
Bibliographic Details
Published in:Materials research bulletin 1994-03, Vol.29 (3), p.225-232
Main Authors: Töpfer, J., Feltz, A., Dordor, P., Doumerc, J.P.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Conductivity phenomena in semiconductors and insulators
Electronic transport in condensed matter
Exact sciences and technology
Inorganic compounds
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Thermoelectric and thermomagnetic effects
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Information about the distribution of cations between tetrahedral (A) and octahedral (B) sites in the spinel structure of NiMn 2O 4 and some substituted spinel phases are derived from thermopower measurements in connection with some ion distribution models. The cubic spinel NiMn 2O 4 is characterized by a high degree of inversion coupled with disproportionation of Mn III with formation of Mn II on tetrahedral and Mn IV on octahedral sites. Spinels of the series Li zNiMn 2−zO 4 show increased concentrations of Mn IV on the B-sites and the Mn II content on the A-sites is reduced. FeNiMnO 4 is dominated by partial Fe octahedral site occupation connected with Mn disproportionation.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(94)90017-5