Critical electron scattering in UGe2 near the magnetic phase transition induced by pressure

The electrical resistivity of single crystalline ferromagnetic UGe2 has been measured under high pressure up to 2 GPa. It is found that the Curie temperature T-C decreases with increasing pressure and the ferromagnetism disappears at high pressure. The temperature dependent electrical resistivity is analyzed on the basis of spin fluctuation theory. The T-2 term was observed at low temperature and the coefficient shows a divergence near the critical pressure. A T-5/3 dependence in the rho(T) curve was observed below and above T-C and its pressure effect is discussed briefly. (C) 1998 Published by Elsevier Science S.A.