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

Magnetochemistry

Alexandre Bataille¹  Marc Lenertz¹  Béatrice Gillon¹  Dominique Luneau²  Yuri Chumakov²  Olga Iasco²  Frédéric Guégan²  Jean-François Jacquot³ 

[1] Laboratoire Léon Brillouin (LLB), CEA-CNRS, UMR CNRS 12, C.E.A. Saclay, 91191 Gif-sur-Yvette, France;Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Université Claude Bernard Lyon 1, 69622 Villeurbanne cedex, France;SCIB, UMR-E 3 CEA/UJF-Grenoble 1, INAC, CEA-UJF, F-38054 Grenoble, France;

关键词: magnetic anisotropy;    spin cluster;    polarized neutron diffraction;    local susceptibility tensor;    molecular magnetism;    transition metal complexes;   

DOI  :  10.3390/magnetochemistry3030025

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown