Czechoslovak Journal of Physics

, Volume 46, Supplement 4, pp 2137–2138 | Cite as

Magnetization reversal in single ferromagnetic Ni and Co particles

  • Klaus Hasselbach
  • Wolfgang Wernsdorfer
  • Dominique Mailly
  • Bernard Barbara
  • Alain Benoît
Magnetism (Experiment)

Abstract

Presented are magnetization measurements of single submicronic particles (500–50 nm) at very low temperature (0.1–6 K). We are studying the mean switching field and the switching probability as a function of the field sweeping rate and temperature. For temperatures down to 1 K we observe an increase of the mean switching field. Below, the mean switching field becomes temperature independent. The results are compared with models of thermally activated switching and macroscopic quantum tunneling.

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Copyright information

© Institute of Physics, Acad. Sci. CR 1996

Authors and Affiliations

  • Klaus Hasselbach
    • 1
  • Wolfgang Wernsdorfer
    • 1
    • 2
  • Dominique Mailly
    • 3
  • Bernard Barbara
    • 2
  • Alain Benoît
    • 1
  1. 1.CRTBT, laboratoire associé à l'UJFCNRSGrenoble-Cedex 9France
  2. 2.Laboratoire Louis NéelCNRSGrenoble-Cedex 9France
  3. 3.Laboratoire de Microstructure et MicrolectroniqueCNRSBagneuxFrance

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