Crystallographic and magnetic structure of ZnV $\mathsf{_2}$ O $\mathsf{_4}$

M. Reehuis, A. Krimmel (), N. Büttgen, A. Loidl and A. Prokofiev

The European Physical Journal B: Condensed Matter and Complex Systems, 2003, vol. 35, issue 3, 311-316

Abstract: We report on the crystallographic and magnetic structure of the geometrically frustrated spinel ZnV 2 O 4 as determined by neutron powder diffraction. At T=51 K, a cubic-to-tetragonal phase transition takes place. The low temperature crystallographic structure is characterized by the space group I4 1 /amd and unit cell dimensions ${a/\sqrt{2} \times a/\sqrt{2} \times a}$ with a being the lattice constant of the cubic phase. The corresponding antiferromagnetic structure of the vanadium sublattice can be described by a propagation vector ${{\bf k}=(001)}$ with the magnetic moments being aligned parallel to the c-axis. The ordered magnetic moment is 0.65(5) ${\mu_B}$ per V 3+ ion. The experimental results are in accord with recent theoretical models proposing spin-driven Jahn-Teller distortions. The results are also compared with reports on non-ordering ZnV 2 O 4 . Copyright Springer-Verlag Berlin/Heidelberg 2003

Date: 2003
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DOI: 10.1140/epjb/e2003-00282-4

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