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Titolo:
Long-range hopping correlation and colossal magnetoresistance in doped manganites
Autore:
Yi, HS; Hur, NH; Yu, JJ;
Indirizzi:
Korea Res & Dev Informat Ctr, Supercomp Div, Taejon 305600, South Korea Korea Res & Dev Informat Ctr Taejon South Korea 305600 5600, South Korea Korea Res Inst Stand & Sci, Ctr CMR Mat, Taejon 305600, South Korea Korea Res Inst Stand & Sci Taejon South Korea 305600 305600, South Korea Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea Seoul Natl Univ Seoul South Korea 151742 Phys, Seoul 151742, South Korea Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea Seoul Natl Univ Seoul South Korea 151742 Res, Seoul 151742, South Korea
Titolo Testata:
JOURNAL OF PHYSICS-CONDENSED MATTER
fascicolo: 25, volume: 12, anno: 2000,
pagine: 5453 - 5462
SICI:
0953-8984(20000626)12:25<5453:LHCACM>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOUBLE-EXCHANGE MODEL; KONDO-LATTICE MODEL; MIXED-VALENCE MANGANITES; TEMPERATURE-DEPENDENCE; PHASE-SEPARATION; SPIN DYNAMICS; RESISTIVITY; LOCALIZATION; CONDUCTIVITY; LA1-XSRXMNO3;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Yi, HS Korea Res & Dev Informat Ctr, Supercomp Div, POB 122, Taejon 305600, SouthKorea Korea Res & Dev Informat Ctr POB 122 Taejon South Korea 305600 rea
Citazione:
H.S. Yi et al., "Long-range hopping correlation and colossal magnetoresistance in doped manganites", J PHYS-COND, 12(25), 2000, pp. 5453-5462

Abstract

The nature of the paramagnetic-insulator-to-ferromagnetic-metal transitionand the associated colossal magnetoresistance (CMR) in doped manganites isre-investigated on the basis of the double-exchange model by using a MonteCarlo technique. We calculate the temperature dependence of the magnetic susceptibility and resistivity by taking account of the magnetic fluctuationtogether with the long-range hopping correlation. The results show Curie-Weiss behaviour of the susceptibility, consistent with a sharp peak in the resistivity near the Curie temperature T-c. The estimated value of T-c and the magnitude of the CMR in the magnetic field are in good agreement with experiments. Our results clearly demonstrate the importance of the magnetic fluctuation and the long-range hopping correlation in the CMR manganites.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/18 alle ore 02:06:26