We report measurements of nuclear magnetic resonance on oriented nuclei (NMR-ON) on ${}_{}{}^{99\mathit{m}}{}_{}{}^{}\mathrm{Rh}$ (${\mathit{I}}^{\mathrm{\pi }}$=9/$2^{+}$,${\mathit{T}}_{1/2}$=4.7 h), and ${}_{}{}^{101\mathit{m}}{}_{}{}^{}\mathrm{Rh}$ (${\mathit{I}}^{\mathrm{\pi }}$=9/$2^{+}$,${\mathit{T}}_{1/2}$=4.3 d) in Fe and Ni. The new measurements do not support the existence of a Knight shift of ∼-5% for RhFe as postulated in the literature. The shift of the NMR-ON resonances with an external magnetic field is discussed critically, especially those effects which may simulate a Knight shift.

• Received 24 October 1994

DOI:https://doi.org/10.1103/PhysRevB.51.11484