English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/47596
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Structural and magnetic properties of amorphous Co-W alloyed nanoparticles

AuthorsFigueroa, A. I.; Bartolomé, Juan; García, L. M.; Bartolomé, Fernando; Magen, Cesar
Issue DateNov-2011
PublisherAmerican Physical Society
CitationPhysical Review B 84(18): 184423 (2011)
AbstractW-capped Co nanoparticles dispersed in an alumina matrix are studied by means of high-resolution transmission electron microscopy, extended x-ray absorption fine structure, SQUID-based magnetic measurements, dc magnetization, ac magnetic susceptibility, and x-ray magnetic circular dichroism. Results show the formation of amorphous Co-W alloy nanoparticles, the magnetic properties of which are modified by the amount of W or Co present in the samples. The average Co magnetic moment depends on the number of W atoms surrounding it. Co-W particles show superparamagnetic behavior and are described as an array of noninteracting particles with random anisotropy axes and an average moment per particle proportional to the particle volume and to the average Co moment for each alloy composition. Values of the magnetic anisotropy constant of the particles are on the order of 106 erg/cm3, higher than that of bulk Co. Evidence of short-range ordering within each amorphous particle is found that provides insight of the origin of their magnetic anisotropy.
Description18 páginas, 20 figuras, 4 tablas.-- PACS number(s): 75.75.Fk, 75.50.Kj, 75.30.Gw, 61.46.Df.-- et al.
et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.84.184423
URIhttp://hdl.handle.net/10261/47596
DOI10.1103/PhysRevB.84.184423
ISSN1098-0121
E-ISSN1550-235X
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
e184423.pdf2,07 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.