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Local field dynamics in a resonant quantum tunneling system of magnetic molecules

Author

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  • T. Ohm
  • C. Sangregorio
  • C. Paulsen

Abstract

We observed non-exponential relaxation for a quantum tunneling molecular magnetic system at very low temperatures and argue that it results from evolving intermolecular dipole fields. At the very beginning of the relaxation, the magnetization follows a square-root time dependence. A simple model is developed for the intermediate time range that is in good agreement with the data over 4 decades in time. Detailed numerical calculations as well as measurements are presented which indicate unusual correlation effects in these systems. Copyright EDP Sciences, Springer-Verlag 1998

Suggested Citation

  • T. Ohm & C. Sangregorio & C. Paulsen, 1998. "Local field dynamics in a resonant quantum tunneling system of magnetic molecules," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 6(2), pages 195-199, November.
    • Handle: RePEc:spr:eurphb:v:6:y:1998:i:2:p:195-199:10.1007/s100510050541
    DOI: 10.1007/s100510050541
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