Relationship between spin state of Co ions and thermopower in La1-xSrxCoO3(0=<x=<0.5)
- 1. Department of Physics, Zhejiang University, Hangzhou 310027 (China)
- 2. Department of Physics, China Institute of Metrology, Hangzhou 310018 (China)
- 3. Colleage of Information Engineering, Zhejiang University of Technology, Hangzhou 310032 (China)
Description
We report the evolution of magnetic properties and thermopower (S) of the La1-xSrxCoO3 (0==0.2, and the temperature dependence of magnetic susceptibility can be fitted to the Curie-Weiss law for T>TC. Assuming that the Co3+ ions are in the intermediate spin (IS) state, the spin of Co4+ ions is 2.25 determined from DC magnetic susceptibility, which means that the most Co4+ ions should be in the high spin (HS) state. The room-temperature thermopower, S (300 K), can be described by the modified Heikes formula assuming that the Co3+ ions are in the IS state, and the most Co4+ ions are in the HS state. The results suggest that both the degeneracy of charge carriers and the strong electron correlation play important roles in determining the thermopower in cobalt oxides
Additional details
Identifiers
- DOI
- 10.1016/j.physleta.2005.11.027;
- PII
- S0375-9601(05)01747-0;
Publishing Information
- Journal Title
- Physics Letters. A
- Journal Volume
- 351
- Journal Issue
- 6
- Journal Page Range
- p. 431-434
- ISSN
- 0375-9601
- CODEN
- PYLAAG
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37068629
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHARGE CARRIERS; COBALT IONS; COBALT OXIDES; CURIE-WEISS LAW; ELECTRON CORRELATION; LANTHANUM COMPOUNDS; MAGNETIC SUSCEPTIBILITY; PARAMAGNETISM; SPIN; STRONTIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; TRANSITION TEMPERATURE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; CHALCOGENIDES; CHARGED PARTICLES; COBALT COMPOUNDS; CORRELATIONS; IONS; MAGNETIC PROPERTIES; MAGNETISM; OXIDES; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.