Dense Kondo compound Ce5Ge3

Magnetic and transport properties of Ce5Ge3 and La5Ge3 have been studied. T he magnetic susceptibility of Ce5Ge3 above 90 K is fitted with a Curie-Weis s law with an effective paramagnetic moment of 2.66 mu(B) and a paramagneti c Curie temperature of - 30.9 K. Arrott plot shows that Ce5Ge3 has a sponta neous magnetization below 6.4 K. The magnetization curve shows large hyster esis with remanent magnetic moment of 0.24 mu(B) and coercive field of 1.2 kOe at 2.0 K. The magnetization at 1.9 K reaches 0.9 mu(B)/Ce at 145 kOe an d saturation behavior is not found even at this high field. The temperature dependence of the magnetic resistivity indicates that Ce5Ge3 can be classi fied as a dense Kondo system. (C) 1999 Elsevier Science B.V. All rights res erved.