EPR and magnetic quantum tunneling studies of the mixed valent Mn-4(anca)(4)(Hedea)(2)(edea)(2) center dot 2CHCl(3), EtOH single-molecule magnet

    Authors

    J. J. Liu; C. C. Beedle; H. M. Quddusi; E. del Barco; D. N. Hendrickson;S. Hill

    Comments

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    Abbreviated Journal Title

    Polyhedron

    Keywords

    Single-molecule magnet; Electron Paramagnetic Resonance; Quantum; Tunneling of Magnetization; Magnetic anisotropy; LOW-DIMENSIONAL CONDUCTORS; Chemistry, Inorganic & Nuclear; Crystallography

    Abstract

    High-frequency Electron Paramagnetic Resonance (EPR) and Quantum Tunneling of Magnetization (QTM) measurements have been carried out on single-crystal samples of a mixed-valent (Mn2Mn2III)-Mn-II single-molecule magnet (SMM). Frequency, temperature and field-oriented studies reveal an S = 9 spin ground state with low-lying excited spin states. Numerical simulations were performed via exact diagonalization of a multi-spin Hamiltonian, in which the anisotropy of the molecule is based on the anisotropy of the individual ions and their couplings. We found that the EPR and QTM spectra may adequately be explained with two s = 5/2 Mn-II ions weakly coupled to a rigid s = 4 spin, formed by the two ferromagnetically coupled Mn-III ions. (C) 2011 Elsevier Ltd. All rights reserved.

    Journal Title

    Polyhedron

    Volume

    30

    Issue/Number

    18

    Publication Date

    1-1-2011

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    2965

    Last Page

    2968

    WOS Identifier

    WOS:000298522800003

    ISSN

    0277-5387

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