Structure and Magnetism of a Novel Nickel Sulfate Ni2-δSO5

Abstract:

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We succeeded in synthesizing single crystals of a novel nickel sulfate Ni2-δSO5 by a hydrothermal method. A single-crystal X-ray diffraction revealed a tetragonal structure with lattice constants, a = 5.184 Å and c = 12.91 Å. In this structure, one-dimensional chains composed of face-shared NiO6 octahedra elongate along the a axis and the b axis alternately, constructing a ‘log-cabin’ type framework where neighbor chains lying orthogonally to each other are connected by SO4 tetrahedra. A detailed refinement of the structure suggested that the site occupancy of Ni is only 63%, corresponding to δ ≈ 2/3. Furthermore, X-ray oscillation photographs exhibit diffuse-scattering patterns probably arising from a short-range order of the Ni defects. Magnetic susceptibility revealed an antiferromagnetic transition accompanied by a weak ferromagnetism at 17 K.

Info:

Periodical:

Solid State Phenomena (Volume 170)

Edited by:

J.-L. Bobet, B. Chevalier and D. Fruchart

Pages:

25-28

DOI:

10.4028/www.scientific.net/SSP.170.25

Citation:

M. Takahashi et al., "Structure and Magnetism of a Novel Nickel Sulfate Ni2-δSO5", Solid State Phenomena, Vol. 170, pp. 25-28, 2011

Online since:

April 2011

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Price:

$35.00

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