An Ni4 Single‐Molecule Magnet: Synthesis, Structure and Low‐Temperature Magnetic Behavior
- 25 May 2004
- journal article
- research article
- Published by Wiley in European Journal of Inorganic Chemistry
- Vol. 2004 (11) , 2219-2222
- https://doi.org/10.1002/ejic.200400129
Abstract
The reaction of Ni(NO3)2·6H2O with H3thme (trihydroxymethylethane) in the presence of NaOMe leads to a tetranuclear Ni4 complex with a cubane‐like structure. Intramolecular ferromagnetic interactions [J = 10 cm−1 based on H = −J(S1·S2 + S1·S3 + S1·S4 + S2·S3 + S2·S4 + S3·S4)] lead to an S = 4 ground state stabilized by 40 cm−1 from the first S = 3 excited state. Magnetization vs. field studies at different temperatures above 2 K suggest the presence of an axial magnetic anisotropy. Single‐crystal magnetization measurements show a single‐molecule‐magnetic behavior below T = 0.5 K with fast relaxation of the magnetization due to resonant quantum tunneling. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)Keywords
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