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Low temperature magnetic structure of the quasi 1-dimensional magnet Ni2SiO4

Colman, RH; Fennell, T; Ritter, C; Lau, G; Cava, RJ; Wills, AS; (2009) Low temperature magnetic structure of the quasi 1-dimensional magnet Ni2SiO4. HIGHLY FRUSTRATED MAGNETISM 2008 (HFM 2008) , 145 , Article 012037. 10.1088/1742-6596/145/1/012037. Gold open access

Abstract

Ni2SiO4, Liebenbergite, is an example of a quasi-one-dimensional magnet made up of frustrated corner sharing traingles of Ni2+ (S = 1) ions that propagated parallel to the b axis, Ni2SiO4 is isostructural with olivine, a common mineral of varying composition Fe2-xMgxSiO4, and is described in the orthorhombic space group Pnma. A synthetic polycrystalline sample of Ni2SiO4 was studied using powder neutron diffraction with spectra taken above and below that antiferromagnetic ordering transition (T-N approximate to 34 K). Analysis of the magnetic structure was carried out using symmetry models of corepresentation theory. The refined spin structure evidences both ferromagnetic and antiferromagnetic inter-chain interactions, and ferromagnetic intra-chain coupling. The competition between the magnetic interactions can be seen in the canting of the moments away from a collinear arrangement.

Type: Article
Title: Low temperature magnetic structure of the quasi 1-dimensional magnet Ni2SiO4
Location: Technische Univ, Braunschweig, GERMANY
Open access status: An open access publication
DOI: 10.1088/1742-6596/145/1/012037
Keywords: ANTIFERROMAGNET
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/168245
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