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Magnetochemistry 2017, 3(3), 25; https://doi.org/10.3390/magnetochemistry3030025

Mapping the Magnetic Anisotropy inside a Ni4 Cubane Spin Cluster Using Polarized Neutron Diffraction

1
Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Université Claude Bernard Lyon 1, 69622 Villeurbanne cedex, France
2
Laboratory of Inorganic Chemistry, Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
3
Laboratoire Léon Brillouin (LLB), CEA-CNRS, UMR CNRS 12, C.E.A. Saclay, 91191 Gif-sur-Yvette, France
4
SCIB, UMR-E 3 CEA/UJF-Grenoble 1, INAC, CEA-UJF, F-38054 Grenoble, France
Present address: Gebze Technical University, P.O. Box: 141, Gebze, Kocaeli 41400, Turkey and Institute of Applied Physics Academy of Sciences of R. Moldova, Academy Str. 5, MD2028 Chisinau, Moldova.
Present address: Institut de physique et chimie des matériaux de Strasbourg (IPCMS), UMR7504, 23 Rue du Loess, 67034 Strasbourg, France.
*
Author to whom correspondence should be addressed.
Received: 24 April 2017 / Revised: 1 June 2017 / Accepted: 3 July 2017 / Published: 13 July 2017
(This article belongs to the Special Issue Transition Metal Magnetism)
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Abstract

In this publication, we report on the study of the magnetic anisotropy of the cubane type tetranuclear cluster of Ni(II), [Ni4(L)4(MeOH)4] (H2L = salicylidene-2-ethanolamine; MeOH = methanol), by the means of angular-resolved magnetometry and polarized neutron diffraction (PND). We show that better than other usual characterization techniques—such as electron paramagnetic resonance spectroscopy (EPR) or SQUID magnetometry—only PND enables the full determination of the local magnetic susceptibility tensor of the tetranuclear cluster and those of the individual Ni(II) ions and the antiferromagnetic pairs they form. This allows highlighting that, among the two antiferromagnetic pairs in the cluster, one has a stronger easy-axis type anisotropy. This distinctive feature can only be revealed by PND measurements, stressing the remarkable insights that they can bring to the understanding of the magnetic properties of transition metals clusters. View Full-Text
Keywords: magnetic anisotropy; spin cluster; polarized neutron diffraction; local susceptibility tensor; molecular magnetism; transition metal complexes magnetic anisotropy; spin cluster; polarized neutron diffraction; local susceptibility tensor; molecular magnetism; transition metal complexes
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Iasco, O.; Chumakov, Y.; Guégan, F.; Gillon, B.; Lenertz, M.; Bataille, A.; Jacquot, J.-F.; Luneau, D. Mapping the Magnetic Anisotropy inside a Ni4 Cubane Spin Cluster Using Polarized Neutron Diffraction. Magnetochemistry 2017, 3, 25.

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