Magnetic properites of the Heavy Fermion Antiferromagnets YbNiAl and   YbPtAl
  Measurements of electrical resistivity and Hall effect as a function of magnetic field on the Heavy Fermion Systems YbNiAl and YbPtAl are presented. Both compounds order antiferro magnetically and show metamagnetic behavior in a magnetic field. Scaling behavior of the magnetoresistance above TN suggests that the paramagnetic regime for YbNiAl can be described in terms of a single ion Kondo effect. 
J. Diehl, H. Davideit, S. Klimm and S. Horn (Lehrstuhl fuer   Experimentalphysik II, Uni-Augsburg, 86135 Augsburg, Germany) ...