Magnetism and superconductivity of heavy fermion matter

The interplay of magnetism and unconventional superconductivity (d singlet wave or p triplet wave) in a strongly correlated electronic system (SCES) is discussed with recent examples found in heavy fermion compounds. A short presentation is given on the formation of the heavy quasiparticle with the two sources of a local and intersite enhancement for the effective mass. Two cases of the coexistence or repulsion of antiferromagnetism and superconductivity are given with CeIn 3 and CeCoIn 5 . A spectacular example is the emergence of superconductivity in relatively strong itinerant ferromagnets UGe 2 and URhGe. The impact of heavy fermion matter among other SCES as organic conductor or high T C oxide is briefly pointed out.