Advertisement

Dynamics of Atomic Structure

  • Satoru Sugano
  • Hiroyasu Koizumi
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 20)

Abstract

Fluctuation of atomic structures of metal microclusters can be observed by using an electron microscope of atomic resolution with a television camera. Such a structural fluctuation is one of the characteristics of microclusters. By utilizing a computer, dynamical properties of small microclusters are studied for the size N = 13 bound by the Lennard-Jones interaction. The coexistence of solid-like and liquid-like phases is pointed out at the effective temperature between those for melting and freezing. On the other hand, for the transition-metal cluster of size N = 6, a fluctuating state that does not involve atomic diffusion has been found just below the melting temperature, and a transition to permutation isomers which accompany atomic diffusion just above the melting temperature. Thermal properties of transition-metal microclusters are studied by using Monte-Carlo simulations for the two cases: absence and presence of a magnetic interaction. A sharp magnetic transition exists even in the small magnetic cluster of size N = 7. Finally, rapid spontaneous alloying of microclusters recently observed is discussed.

Keywords

Copper Deposition Gold Cluster Fluctuate State Caloric Curve Pentagonal Symmetry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Satoru Sugano
    • 1
  • Hiroyasu Koizumi
    • 2
  1. 1.Nagano, 380Japan
  2. 2.Faculty of ScienceHimeji Institute of TechnologyHyougoJapan

Personalised recommendations