Measured static hyperfine magnetic field for Pt in Gd

The hyperfine magnetic fields present at ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$, ${}_{}{}^{196}{}_{}{}^{}\mathrm{Pt}$, and ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$ nuclei implanted into polarized, ferromagnetic Gd at 92 K were measured using the ion-implantation perturbed angular correlation (IMPAC) technique following Coulomb excitation. The present measured precession for ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$ agrees with earlier work, but that for ${}_{}{}^{196}{}_{}{}^{}\mathrm{Pt}$ does not. Our data imply a static field strength for Pt in Gd at 92 K of -38±5 T, which is ∼50% of the magnitude obtained in the only previous measurement. It is likely that the hyperfine field for Pt in Gd has an anomalous dependence on temperature, similar to that observed for Os in Gd.