The paramagnetic susceptability of neutron irradiated V3Ge single crystals

The paramagnetic susceptibility χ of V₃Ge single crystals was measured in the temperature range from 10 K to 350 K after irradiation with neutron fluences of $\text{(0.3?20) × 10}{}^{18}\text{n}\text{cm}{}^2\text{(E>1}\text{MeV}\text{)}$. Unirradiated crystals show a flat maximum at T=65±6 K, which disappears at high neutron doses. The temperature dependence and the absolute values of χ are continuously reduced by increasing neutron doses. This behaviour can be understood by the models of high density of states (DOS) proposed for A15 materials confirming the assumption that a sharp peak in the electronic density of states exists which is lowered and broadened by irradiation induced defects.