Influence of the interface on the magnetic moment of Co clusters in a Cu matrix

Author

Prieto, A. García ; Fdez-Gubieda, M.L. ; Chaboy, J. ; Laguna-Marco, M.A. ; Muro, T. ; Nakamura, T.

Author_Institution

Dept. de Electr. y Electron., Pais Vasco Univ., Bilbao, Spain

fYear

2005

fDate

4-8 April 2005

Firstpage

1299

Lastpage

1300

Abstract

This work is aimed to determine the influence of the interfacial atoms on the magnetic moments of the Co clusters. X-ray magnetic circular dichroism measurements have been performed on the Co L_2,3 edges of Co₅Cu₉₅ granular alloys annealed at 300, 400, 450, 500 and 550°C. These experiments were performed at 40 K and under an applied magnetic field of 1.4 T. The total magnetic moment increases to the value of bulk fcc Co, which is consistent with the progressive formation of superparamagnetic nanoclusters from the atoms diluted into the Cu matrix having a negligible paramagnetic contribution.

Keywords

annealing; cobalt alloys; copper alloys; dilute magnetic materials; granular materials; interface magnetism; magnetic circular dichroism; magnetic moments; magnetic particles; metal clusters; nanostructured materials; superparamagnetism; 1.4 T; 300 degC; 40 K; 400 degC; 450 degC; 500 degC; 550 degC; Co clusters; Co₅Cu₉₅; Cu matrix; X-ray magnetic circular dichroism; annealing; granular alloys; interfacial atoms; magnetic field; magnetic moment; superparamagnetic nanoclusters; Annealing; Cobalt alloys; Magnetic moments; Orbital calculations; Paramagnetic materials; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464079

Filename

1464079