Title

Manifestation of Spin Selection Rules on the Quantum Tunneling of Magnetization in a Single-Molecule Magnet

Authors

Authors

J. J. Henderson; C. Koo; P. L. Feng; E. del Barco; S. Hill; I. S. Tupitsyn; P. C. E. Stamp;D. N. Hendrickson

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Phys. Rev. Lett.

Keywords

MN-12-ACETATE; NANOMAGNETS; DISTORTION; COHERENCE; COMPLEXES; CLUSTERS; CRYSTAL; Physics, Multidisciplinary

Abstract

We present low temperature magnetometry measurements on a new Mn-3 single-molecule magnet in which the quantum tunneling of magnetization (QTM) displays clear evidence for quantum mechanical selection rules. A QTM resonance appearing only at high temperatures demonstrates tunneling between excited states with spin projections differing by a multiple of three. This is dictated by the C-3 molecular symmetry, which forbids pure tunneling from the lowest metastable state. Transverse field resonances are understood by correctly orienting the Jahn-Teller axes of the individual manganese ions and including transverse dipolar fields. These factors are likely to be important for QTM in all single-molecule magnets.

Journal Title

Physical Review Letters

Volume

103

Issue/Number

1

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000267697900050

ISSN

0031-9007

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