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Magnetochemistry 2016, 2(2), 23;

Evidence of Slow Magnetic Relaxation in Co(AcO)2(py)2(H2O)2

School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
Authors to whom correspondence should be addressed.
Academic Editor: Marius Andruh
Received: 1 March 2016 / Revised: 5 April 2016 / Accepted: 13 April 2016 / Published: 20 April 2016
(This article belongs to the Special Issue Magnetic Anisotropy)
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The monometallic pseudo-octahedral complex, [Co(H2O)2(CH3COO)2(C5H5N)2], is shown to exhibit slow magnetic relaxation under an applied field of 1500 Oe. The compound is examined by a combination of experimental and computational techniques in order to elucidate the nature of its electronic structure and slow magnetic relaxation. We demonstrate that any sensible model of the electronic structure must include a proper treatment of the first-order orbital angular momentum, and we find that the slow magnetic relaxation can be well described by a two-phonon Raman process dominating at high temperature, with a temperature independent quantum tunnelling pathway being most efficient at low temperature. View Full-Text
Keywords: single-ion magnet; slow relaxation; magnetic anisotropy; zero-field splitting; cobalt single-ion magnet; slow relaxation; magnetic anisotropy; zero-field splitting; cobalt

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Walsh, J.P.S.; Bowling, G.; Ariciu, A.-M.; Jailani, N.F.M.; Chilton, N.F.; Waddell, P.G.; Collison, D.; Tuna, F.; Higham, L.J. Evidence of Slow Magnetic Relaxation in Co(AcO)2(py)2(H2O)2. Magnetochemistry 2016, 2, 23.

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