Electric field gradients in copper-nickel alloys

Abstract

We have measured the electric field gradients at copper atoms which are near neighbors to the nickel impurity in a dilute $\mathrm{Cu}\mathrm{Ni}$ alloy. The technique used in this study is zero-field pure quadrupole resonance which was first demonstrated by Redfield. The measured electric field gradients for this alloy system are 4.1 × ${10}^{23}$ ${\mathrm{cm}}^{-3\mathrm{}}$, 0.84 × ${10}^{23}$ ${\mathrm{cm}}^{-3\mathrm{}}$, 0.46 × ${10}^{23}$ ${\mathrm{cm}}^{-3\mathrm{}}$, and 0.146 × ${10}^{23}$ ${\mathrm{cm}}^{-3\mathrm{}}$. These measured values are compared to the values calculated by Beal-Monod. In addition, the following alloy systems are studied: $\mathrm{Cu}\mathrm{Co}$, $\mathrm{Cu}\mathrm{Fe}$, and $\mathrm{Cu}\mathrm{V}$. The nuclear relaxations of these alloys were measured but no satellite structure was detected.