Tuning magnetization avalanches in Mn$_{12}$-acetate

ORAL

Abstract

We report the results of a systematic study of magnetic avalanches (abrupt magnetization reversals) in the molecular magnet Mn$_{12}$-acetate using a micron-sized Hall sensor array. Measurements were taken for: (a) fixed magnetic field (constant barrier against spin reversal); and (b) fixed energy release obtained by adjusting the barrier and $\Delta M$. A detailed comparison with the theory of magnetic deflagration of Garanin and Chudnovsky [1] will be presented and discussed. [1] D. A. Garanin and E. M. Chudnovsky, Phys. Rev. B 76, 054410 (2007)

*Work at CCNY supported by NSF grant DMR-00451605

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Authors

  • Bo Wen

    • City College of New York

  • S. McHugh

    • City College of New York

  • Xiang Ma

    • City College of New York

  • M. P. Sarachik

    • City College of New York

  • Y. Myasoedov

    • The Weizmann Institute of Science

  • H. Shtrikman

    • The Weizmann Institute of Science

  • E. Zeldov

    • The Weizmann Institute of Science

  • R. Bagai

    • University of Florida - Gainesville

  • G. Christou

    • University of Florida - Gainesville