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Abstract
The NMR spectra of V 3Au samples with different degrees of atomic ordering have been investigated. The central resonance line and the first quadrupole satellites could be detected. The position and width of these lines as a function of the applied magnetic field strength were determined. The shape of the central line gives information about the anisotropy of the Knight shift, whereas the position of the satellites gives information about the electric field gradients (EFG) in this compound. It is shown that the definition of the Knight shift from the satellites is more meaningful than the Knight shift derived from the central line. Anisotropic effects have been studied more thoroughly than in the previous research. EFG values of the differently ordered samples are compared with each other. Precision lattice-parameter measurements were made and they show that the V—V separation in all of our samples varies by less than 0.05%. There appears to be no evidence of a correlation between the EFG and the density of states of the electrons at the Fermi level: N( E F).
Published Version
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