Transport in Gd-doped EuO

Transport properties of 2% Gd-doped EuO with Tc≈123°K have been investigated. The resistivity anomaly in the neighborhood of T c can be explained satisfactorily by critical scattering theory. Estimates of the exchange interaction between conduction electrons and localized spins are found to vary from 4.9×10-2 eV in Gd: EuO to 4.3×10-2 eV in Gd: EuS. © 1970 The American Institute of Physics.