1.
J Phys Condens Matter
; 25(28): 286005, 2013 Jul 17.
Artigo
em Inglês
| MEDLINE
| ID: mdl-23793164
RESUMO
The magnetic structure of the metallic antiferromagnet Ag2NiO2 with the Néel temperature TN = 56 K has been investigated by means of a neutron diffraction technique using a powder sample in the temperature range between 5 and 65 K. The antiferromagnetic (AF) diffraction peaks are clearly observed below TN and can be indexed with the propagation vector [Formula: see text]. Based on the results of both a representational analysis and a Rietveld refinement of the magnetic peaks, the AF spin structure is determined as an A-type AF structure with ml = m0cos(2πk â l), where ml is the moment at the lth Ni(3+) site and m0 = (0.31,0,0.65) µB at 5 K.