Manifestation of Spin Selection Rules on the Quantum Tunneling of Magnetization in a Single-Molecule Magnet
Abbreviated Journal Title
Phys. Rev. Lett.
MN-12-ACETATE; NANOMAGNETS; DISTORTION; COHERENCE; COMPLEXES; CLUSTERS; CRYSTAL; Physics, Multidisciplinary
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.
Physical Review Letters
"Manifestation of Spin Selection Rules on the Quantum Tunneling of Magnetization in a Single-Molecule Magnet" (2009). Faculty Bibliography 2000s. 1631.