A nuclear magnetic resonance (NMR) study was carried out to investigat
e the magnetic properties of a polycrystalline sample of superconducti
ng Nd2CuO3.8F0.2. It was found that both the shift and the width of th
e F-19-NMR line decreased as temperature increased from 4.2 to 200 K.
Since there existed no indications of peak splits at any temperature,
all the F ions were considered to be located in one of the two oxygen
sites, i.e., not in both. The Cu-NMR spectra were quite similar to tho
se reported for Nd2-yCeyCuO4. In addition, the frequency spectra in ze
ro field at 1.3 K indicated that the Nd2CuO4 phase was absent but an u
nknown metallic and ''antiferromagnetic'' phase existed, as previously
reported for Nd1.85Ce0.15CuO4.