Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
72 (1992), S. 4480-4482
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The electronic structure of K2NiF4 is calculated with ab initio, full potential and spin polarized pseudofunction energy band method. The bands are flat and have the indirect band gap of 0.7 eV between the occupied valence bands and empty conduction bands. The band gap is strongly influenced by the existence of [NiF6] crystal field and antiferromagnetic exchange interaction. Charge density plots show an anisotropic bonding between Ni and F in the basal plane and along the apical direction. Spin density plots exhibit an antiferromagnetic ordering with large localized moments on the Ni sites. However, a small fluctuation of net spin density is observed at the F sites. The computed optical conductivity is rather unremarkable with very small optically active structure. The salient features of our results are consistent with experimental observations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.352182
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