Anisotropy Enhancement in Co Granular Multilayers by Capping |
| Journal |
Materials Science Forum (Volume 570) |
| Volume |
Metastable and Nanostructured Materials III |
| Edited by |
Dílson S. dos Santos |
| Pages |
1-9 |
| DOI |
10.4028/www.scientific.net/MSF.570.1 |
| Online since |
February, 2008 |
| Authors |
J. Bartolomé,
F. Luis,
L.M. García,
F. Bartolomé,
F. Petroff,
C. Deranlot,
F. Wilhelm,
A. Rogalev,
P. Bencok,
N.B. Brookes
|
| Keywords |
Fine Particle System, Magnetic Anisotropy, Nanocrystalline Material |
| Abstract |
The effect of capping with Cu, Au and Pt of an array of Co nanoparticles is revised.
The magnetic surface anisotropy KS was found to be the dominant contribution to the
effective anisotropy Keff of the particles. Recent X-ray Magnetic Circular Dichroism
(XMCD) measurements show that there is hybridization between the 3d Co electrons
and the d and 4p electrons of the capping metal. By comparison to the mechanisms
which give rise to the surface anisotropy in thin films, it is argued that this hybridization
governs the modification of KS, and hence, of Keff. |
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