Tunneling splittings in Mn12-acetate single crystals

E. Del Barco, A. D. Kent, E. M. Rumberger, D. N. Hendrickson, G. Christou

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high-quality Mn12-acetate single crystals in the pure quantum relaxation regime and for fields applied parallel to the magnetic easy axis. With this method several individual tunneling resonances have been studied over a broad range of time scales. The relaxation is found to be non-exponential and a distribution of tunnel splittings is inferred from the data. The distributions suggest that the inhomogeneity in the tunneling rates is due to disorder that produces a non-zero mean value of the average transverse anisotropy, such as in a solvent disorder model. Further, the effect of intermolecular dipolar interaction on the magnetic relaxation has been studied.

    Original languageEnglish (US)
    Pages (from-to)768-774
    Number of pages7
    JournalEurophysics Letters
    Volume60
    Issue number5
    DOIs
    StatePublished - Dec 2002

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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