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The Scientific World Journal
Volume 2013, Article ID 468327, 9 pages
http://dx.doi.org/10.1155/2013/468327
Research Article

First-Principles Study on Stability and Magnetism of ( , ) Clusters

Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China

Received 23 March 2013; Accepted 27 April 2013

Academic Editors: A. Hermann, A. Ovchinnikov, and A. Savchuk

Copyright © 2013 Xiao Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The investigation on the structures, stabilities, and magnetism of ( , ) clusters has been made by using first principles. We found some new ground-state structures which had not been found before. These mixed species prefer to adopt three-dimensional (3D) structures starting from four atoms. All the ground-state structures for the Ni-Al clusters are different from those of the corresponding pure Al clusters with the same number of atoms except for three atoms. The Mulliken population analysis shows that some charges transfer from the Al atoms to the Ni atoms. (  = odd number) cations, Ni2Al6 neutral, Ni2Al1 and Ni3Al cations and anions, and Ni3Al5 anion have the magnetic moments of 2  . The magnetic moments of NiAl4 and NiAl6 cluster neutrals and cations are 2  and 3  , respectively. All the other cluster neutrals and ions do not have any nontrivial magnetic moments. The 3d electrons in Ni atoms are mainly responsible for the magnetism of the mixed Ni-Al clusters.