Scaling of the thermal conductivity in the mixed phase of UPt3

We present thermal conductivity measurements on the heavy fermion supercond uctor UPt3. We discuss the scaling behavior we have recently found on the m agnetic held thermal conductivity kappa(T,H) of this compound. We show that kappa(T,H) is a probe sensitive to the order parameter, in addition to the zero field data which might lead to significant further advance in the sea rch for the order parameter in UPt3. (C) 1999 Elsevier Science B.V. All rig hts reserved.