Title

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

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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