Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 18    No. 2    April 2008

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Particle swarm optimization computer simulation of Ni clusters
ZHOU Ji-cheng(周继承)1, 2, LI Wen-juan(李文娟)2, ZHU Jin-bo(朱金波)2

1. School of Electronic and Information Engineering, Central South University of Forestry and Technology,Changsha 410004, China; 2. School of Physics and Electronics, Central South University, Changsha 410083, China

Abstract:The stable structures and energies of Ni clusters were investigated using particle swarm optimization(PSO) combined with simulated annealing(SA). Sutton-Chen many-body potential was used in describing the interatomic interactions. The simulation results indicate that the structures of Ni clusters are icosahedral-like and binding energy per atom tends to approach that of bulk materials when the atoms number increases. The stability of Ni clusters depends not only on size but also on symmetrical characterization. The structure stability of Nin clusters increases with the increase of total atom number n. It is also found that there exists direct correlation between stability and geometrical structures of the clusters, and relatively higher symmetry clusters are more stable. From the results of the second difference in the binding energy, the clusters at n=3 is more stable than others, and the magic numbers effect is also found.


Key words: particle swarm optimization; Ni cluster; Sutton-Chen potential; magic numbers effect

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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