Abstract
Magnetization and 75As nuclear magnetic resonance (NMR) measurements in the superconductor NdFeAsO0.83F0.17 (TC~46 K) are performed in order to investigate the effect of the Nd 4f electrons in the superconducting property. The magnetization curve displays a Nd 4f moments generated Curie-Weiss signal in the field of 7 T. 75As NMR spectra in the oriented sample (H0‖ab) are recorded at 7 T in the temperature range 10–300 K and temperature dependent 75As NMR shift, Kab has been obtained. The Kab curve shows a Curie-Weiss type contribution. The magnitude of hyperfine field, Hhf (4.4 kOe/μB) estimated from the Kab vs χ plot indicates a non-negligible RKKY-type interaction between localized Nd 4f moments mediated by itinerant Fe 3d electrons.
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