Advertisement

Magnetization of Gd \(\) cluster: Anomalous thermal behavior

  • V.Z. Cerovski
  • S.D. Mahanti
  • S.N. Khanna

Abstract:

Theoretical studies of the temperature (T) dependence of magnetization of Gd13 clusters have been carried out within a classical Heisenberg model using Monte-Carlo simulations. It is shown that for a broad range of values of \(\), defined as the ratio between competing ferro and anti-ferro magnetic couplings, the cluster magnetization increases with T in the low T region, as seen in experiment. The clusters are also shown to exhibit a wide distribution of moments at a given T, which broadens significantly with increasing T. It is suggested that this may affect the observed magnetic behavior of magnetic clusters in Stern-Gerlach experiments.

PACS. 31.15.Ar Ab initio calculations - 36.40.-c Atomic and molecular clusters - 71.24.+q Electronic structure of clusters and nanoparticles 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • V.Z. Cerovski
    • 1
  • S.D. Mahanti
    • 1
  • S.N. Khanna
    • 2
  1. 1.Department of Physics and Astronomy and The Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824, USAUS
  2. 2.Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USAUS

Personalised recommendations