Title :
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
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 L2,3 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;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464079
