Linear-chain antiferromagnetism in Ni(N2H5)2(SO4)2 |
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Authors: | H.T. Witteveen J. Reedijk |
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Affiliation: | Gorlaeus Laboratories, Department of Solid State Chemistry and Department of Coordination Chemistry, State University P.O. Box 75, Leyden, The Netherlands |
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Abstract: | The compound dihydrazinium bis(sulfato) niccolate(II), Ni(N2H5)2(SO4)2, containing sulfato-bridged chains of Ni(II) ions, can be described as an antiferromagnetic Heisenberg linear-chain system. A reasonable agreement of susceptibility measurements in the temperature region 2–80K, with a theory developed by Weng for antiferromagnetic Heisenberg linear chains with spin S=1, is obtained for a value of the intra-chain interaction . Preliminary results of specific heat measurements, on the other hand, do not fit quite well using this model. The origin of this discrepancy is suggested to be a zero-field splitting of the single ion. |
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