Abstract
We report on magnetic and novel superconducting properties in heavy-fermion (HF) noncentrosymmetric compound CePt 3 Si via the measurement of 195 Pt nuclear spin-lattice relaxation rate 1/ T 1 . This compound reveals the uniform coexistence of antiferromagnetism ( T N =2.2 K) and superconductivity ( T c =0.75 K). CePt 3 Si is the first HF superconductor that reveals a peak in 1/ T 1 just below T c and, additionally, does not follow the T 3 law that was observed for most unconventional HF superconductors. The novel relaxation behavior found below T c may be relevant with a possible novel SC state being realized in the noncentrosymmetric CePt 3 Si
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