The antiferromagnetic form factor of La2NiO4

15 April 1991

journal article
research article
Published by AIP Publishing in Journal of Applied Physics

Vol. 69 (8) , 4860-4862
https://doi.org/10.1063/1.348204

Abstract

Neutron‐diffraction techniques have been used to study the antiferromagnetic form factor of a La₂NiO₄ single crystal at 15 K. The antiferromagnetic form factor was obtained by measuring the integrated intensities of 16 magnetic reflections. A plateau is clearly seen at low Q (up to 3 Å⁻¹) in the experimentally determined form factor, similar to those observed for La₂CuO₄ and Sr₂CuO₂Cl₂. As in the case of these latter compounds, the fit of the experimental data by a Ni²⁺ ionic form factor is not satisfactory. The experimental data are compared with a recent spin‐polarized band calculation and with a covalency model.

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