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Titolo:
Structure and magnetic properties of boron-oxide-coated Fe(B) nanocapsulesprepared by arc discharge in diborane - art. no. 024404
Autore:
Zhang, ZD; Yu, JL; Zheng, JG; Skorvanek, I; Kovac, J; Dong, XL; Li, ZJ; Jin, SR; Yang, HC; Guo, ZJ; Liu, W; Zhuo, XG;
Indirizzi:
Acad Sinica, Inst Met Res, Int Ctr Mat Phys, Shenyang 110015, Peoples R China Acad Sinica Shenyang Peoples R China 110015 yang 110015, Peoples R China Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England Univ Liverpool Liverpool Merseyside England L69 3GH , Merseyside, England Slovak Acad Sci, Inst Phys Expt, Bratislava, Slovakia Slovak Acad Sci Bratislava Slovakia nst Phys Expt, Bratislava, Slovakia Shenyang Polytech Univ, Lab Ultrafine Particles, Shenyang 110023, Peoples R China Shenyang Polytech Univ Shenyang Peoples R China 110023 , Peoples R China
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 2, volume: 6402, anno: 2001,
pagine: 4404 -
SICI:
0163-1829(20010701)6402:2<4404:SAMPOB>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
FE-CO(C) NANOCAPSULES; EXCHANGE-ANISOTROPY; CARBON NANOTUBES; PARTICLES; FE; ALLOYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Zhang, ZD Acad Sinica, Inst Met Res, Int Ctr Mat Phys, Shenyang 110015, Peoples R China Acad Sinica Shenyang Peoples R China 110015 5, Peoples R China
Citazione:
Z.D. Zhang et al., "Structure and magnetic properties of boron-oxide-coated Fe(B) nanocapsulesprepared by arc discharge in diborane - art. no. 024404", PHYS REV B, 6402(2), 2001, pp. 4404

Abstract

The structure and magnetic properties of boron-oxide-encapsulated magneticnanocapsules fabricated by arc discharge in diborane (B2H6) atmosphere have been investigated. The structure of boron-oxide-coated Fe(B) nanocapsulesis different from that of carbon-coated nanocapsules. In contrast to carbon-coated nanocapsules consisting of a crystalline shell of graphite and a core of alpha -Fe and/or Fe3C, boron-oxide-coated Fe nanocapsules show an amorphous surface layer and a core of alpha -Fe [and alpha -Fe(B) solid solution], gamma -Fe, FeB. and/or Fe3B phases. The loop shift in the hysteresis loop indicates the existence of the exchange bias between ferromagnetic andantiferromagnetic components at room temperature. The Fe3O4 phase contributes to the exchange bias as antiferromagnetic components. A very wide energy barrier distribution exists in the Fe(B) nanocapsules.

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Documento generato il 29/09/20 alle ore 09:43:37