Measurement of Electron Spin Density near Co Atoms in Cu

We report NMR and double resonance studies of $\mathrm{Cu}\mathrm{Co}$ in which we resolve satellites due to three shells of Cu near neighbors around isolated Co impurities. The satellite positions show that the spatial form of the spin polarization oscillates with distance and that the conduction electrons on these atoms contribute about - 8% of the total impurity susceptibility. The splittings are measured versus temperature from 1.5 to 450 K.