Radiative detection of NMR studies of domain nuclei in enriched ferromagnetic iron

Combined host (similar to 95 at% enriched stable Fe-57) and very dilute imp urity (similar to 0.01 at% radioactive Co-60) NMR signals have been obtaine d on the one sample of polycrystalline Fe foil utilising perturbations to t he gamma anisotropy from in situ thermally oriented Co-60 nuclei for both r esonances. The NMR-TDNO signals on the Fe-57 sites have been followed down to applied magnetic fields well below the host magnetic saturation and exhi bited two distinct components; a strong, narrow homogeneous signal, superim posed over a broader inhomogeneous signal. The impurity Co-60 Fe-57 inhomog eneous resonance has been studied with three pulse NMRON and the irreversib le decay of the nuclear spin echo measured as a function of applied magneti c field.