Heavy Fermion Superconductivity and Magnetic Order in Noncentrosymmetric CePt3Si

CePt₃Si is a novel heavy fermion superconductor, crystallizing in the CePt₃B structure as a tetragonally distorted low symmetry variant of the AuCu₃ structure type. CePt₃Si exhibits antiferromagnetic order at T_N≈2.2 K and enters into a heavy fermion superconducting state at T_c≈0.75 K. Large values of H'_c2≈-8.5 T/K and H_c2(0)≈5 T refer to heavy quasiparticles forming Cooper pairs. Hitherto, CePt₃Si is the first heavy fermion superconductor without a center of symmetry.