Magnetic Materials Containing the Dicyanamide Anion, {N(Cn)2}-

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作者：
Kurmoo, Mohamedally
Kepert, Cameron J.
机构：
[1] Institut de Physique, Chim. des Mat. de Strasbourg, CNRS-UMR 7504, 23 Rue du Loess, F-67037 Strasbourg Cedex, France
[2] Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
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Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals | / 334卷
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摘要：
The crystal structures and magnetic properties of a series of isostructural magnetic compounds, MII{N(CN)2}2, where M = Cu (1), Ni (2), Co (3) and Fe (4) are presented. The dicyanamide bridges the metal ions in 1 - 4 to form infinite 3-D metal-organic frameworks with a rutile-type structure. Magnetic data for 1 obey the Curie-Weiss law (Θ= -2.1 K). 2 and 3 are ferromagnets with Curie temperatures (TC) of 21 and 9 K; 4 is a canted antiferromagnet (TN= 18.8 K). The coercive field of 4 is 17800 Oe, the largest observed for any metal-organic compound. The maximum energy product (BH) is the highest for 2 and is comparable to alloys of SmCo5. We attribute the large coercive field to a combination of single ion and particle shape anisotropies.
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页码：693 / 702
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