NMR and Thermal Expansion of the Gd(Co_1-<i>x</i>Ni_<i>x</i>)₂ Compounds

Abstract

In order to understand the magnetic behavior of Co atoms in Gd(Co 1- x Ni x ) 2 compounds, the 59 Co nuclear magnetic resonance and the thermal expansion have been measured. The analysis of NMR spectra at 4.2 K, based on a nearest neighbor configuration model, leads to a concentration independent Co moment or about 1 µ B . This result is supported by the concentration dependence of the spontaneous volume magnetostriction derived from thermal expansion measurements.