Magnetic properties and structure evolution of amorphous Co-C nanocomposite films prepared by pulsed filtered vacuum arc deposition

Citation
H. Wang et al., Magnetic properties and structure evolution of amorphous Co-C nanocomposite films prepared by pulsed filtered vacuum arc deposition, J APPL PHYS, 88(8), 2000, pp. 4919-4921
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
0021-8979 → ACNP
Volume
88
Issue
8
Year of publication
2000
Pages
4919 - 4921
Database
ISI
SICI code
0021-8979(20001015)88:8<4919:MPASEO>2.0.ZU;2-B
Abstract
The magnetic properties and structure evolution of CoxC1-x (x=44, 65, 71 at . %) nanocomposite films prepared by pulsed filtered vacuum arc deposition were studied. The as-deposited films consist of amorphous Co clusters in a- C and are soft ferromagnets. The low coercivity in the amorphous films is d ue to the very low anisotropy of the amorphous Co clusters. After annealing in vacuum at 350 degrees C for 1 h, the Co clusters crystallize and these films become magnetically harder. The magnetic hardening is attributed to t he enhanced magnetic anisotropy of the nanocrystals. Their saturation magne tization reduces slightly. This is attributed to the reduction of the densi ty of states at the Fermi level caused by the crystallization of the amorph ous Co clusters. (C) 2000 American Institute of Physics. [S0021-8979(00)030 21-8].