Neutron-diffraction study of the antiferromagnetic form factor of La sub 2 NiO sub 4

Neutron-diffraction techniques have been used to study the antiferromagnetic form factor of a La{sub 2}NiO{sub 4} 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 {ital Q} (up t...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1992-03, Vol.45:10
Main Authors: Wang, X., Stassis, C., Johnston, D.C., Leung, T.C., Ye, J., Harmon, B.N., Lander, G.H., Schultz, A.J., Loong, C., Honig, J.M.
Format: Article
Language:English
Subjects:
360204 - Ceramics, Cermets, & Refractories- Physical Properties
ANTIFERROMAGNETISM
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
FORM FACTORS
LANTHANUM COMPOUNDS
MAGNETISM
MAGNETIZATION
MATERIALS SCIENCE
MONOCRYSTALS
NEUTRON DIFFRACTION
NICKEL COMPOUNDS
NICKELATES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
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Summary:Neutron-diffraction techniques have been used to study the antiferromagnetic form factor of a La{sub 2}NiO{sub 4} 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 {ital Q} (up to 3 A{sup {minus}1}) in the experimentally determined form factor, similar to those observed for La{sub 2}CuO{sub 4} and Sr{sub 2}CuO{sub 2}Cl{sub 2}. The magnetization density deduced from the experimental data exhibits strong ansiotropy in the Ni-O plane. The experimental data are compared with covalency models and a recent spin-polarized band calculation.
ISSN:0163-1829
1095-3795
DOI:10.1103/PhysRevB.45.5645