Low temperature magnetic hysteresis in Mn12-acetate single crystals

Andrew D. Kent, Yicheng Zhong, Louisa Bokacheva, Daniel Ruiz, D. N. Hendrickson, M. P. Sarachik

    Research output: Contribution to journalConference articlepeer-review

    Abstract

    We report precise magnetic hysteresis measurements down to 0.4 K of spin-10 magnetic clusters in small single crystals of Mn12-acetate. At temperatures above 1.6 K, steplike changes in magnetization are observed at regularly spaced magnetic field intervals, as found in earlier measurements. The steps gradually shift to higher magnetic fields as the temperature is decreased to 1.2 K, consistent with the presence of a second-order uniaxial magnetic anisotropy. An abrupt shift in step position is observed at still lower temperature which may be the first evidence of an abrupt, or first-order, transition between thermally assisted and pure quantum tunneling suggested by recent theory.

    Original languageEnglish (US)
    Pages (from-to)5493-5495
    Number of pages3
    JournalJournal of Applied Physics
    Volume87
    Issue number9 II
    DOIs
    StatePublished - May 2000
    Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
    Duration: Nov 15 1999Nov 18 1999

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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