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Titolo:
HIGH-TEMPERATURE THERMOPOWER OF LAMNO3 AND RELATED SYSTEMS
Autore:
MARSH DB; PARRIS PE;
Indirizzi:
UNIV MISSOURI,DEPT PHYS ROLLA MO 65409 UNIV MISSOURI,DEPT PHYS ROLLA MO 65409 UNIV MISSOURI,INST ELECT MAT ROLLA MO 65409
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 23, volume: 54, anno: 1996,
pagine: 16602 - 16607
SICI:
0163-1829(1996)54:23<16602:HTOLAR>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDATION-REDUCTION BEHAVIOR; SR-DOPED LAMNO3; DEFECT STRUCTURE; ELECTRICAL-CONDUCTIVITY; THERMOELECTRIC-POWER; DOUBLE-EXCHANGE; LA1-XSRXMNO3; PEROVSKITES; RESISTIVITY; SPECTRA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
D.B. Marsh e P.E. Parris, "HIGH-TEMPERATURE THERMOPOWER OF LAMNO3 AND RELATED SYSTEMS", Physical review. B, Condensed matter, 54(23), 1996, pp. 16602-16607

Abstract

We investigate theoretically the high-temperature Seebeck coefficientin LaMnO3 and related transition-metal-oxide perovskites. Our analysis employs a model for small polaron conduction that takes into accountthe electronic structure of the 3d orbitals of B-site transition-metal cations, yielding expressions for systems in which conduction occursthrough the e(g) transition-metal manifold. Limiting forms for the Seebeck coefficient as a function of carrier concentration and site degeneracy are identified for strong and weak Coulomb interactions betweenelectrons on the same and neighboring sites. Results are applied to an analysis of experimental data for LaMnO3(,) the La1-xCaxMnO3 series,and the La1-xSrxMnO3 series.

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Documento generato il 30/09/20 alle ore 12:43:39