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Titolo:
Characterization of CoCrFeO4 nanocrystals prepared by a sol-gel method
Autore:
Xiong, G; Mai, ZH; Wang, CY; Ni, YM; Zhao, ZX; Xu, M; Liu, CX; Luo, GM;
Indirizzi:
Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China Chinese Acad Sci Beijing Peoples R China 100080 100080, Peoples R China Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China Chinese Acad Sci Beijing Peoples R China 100080 100080, Peoples R China
Titolo Testata:
CHINESE PHYSICS LETTERS
fascicolo: 5, volume: 18, anno: 2001,
pagine: 692 - 694
SICI:
0256-307X(200105)18:5<692:COCNPB>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPINEL FERRITE NANOCRYSTALLITES; MAGNETIC-PROPERTIES; SIZE; PARTICLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Xiong, G Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China Chinese Acad Sci POB 603 Beijing Peoples R China 100080 R China
Citazione:
G. Xiong et al., "Characterization of CoCrFeO4 nanocrystals prepared by a sol-gel method", CHIN PHYS L, 18(5), 2001, pp. 692-694

Abstract

CoCrFeO4 nanocrystals have been synthesized using a sol-gel method. The specimen has an average grain size of 8.1 nm. The zero-held-cooled and held-cooled curves show a superparamagnetic transition occurring at a blocking temperature of T-B approximate to 249 K. The increase in coercivity of CoCrFeO4 nanocrystals with the decreasing temperature has been detected below theblocking temperature and could be explained by the Stoner-Wohlfarth theory. The temperature dependence of saturation magnetization shows that Bloch'slaw holds but with the Bloch exponent lower than the bulk value.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 09:49:30