Abstract
We report on a 195Pt-NMR study of the antiferromagnetic heavy-fermion (HF) superconductor CePt 3Si without an inversion center. The measurements of the nuclear spin-lattice relaxation rate 1 / T 1 has revealed a uniform coexistence of antiferromagnetism and superconductivity. CePt 3Si 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. We remark that this unexpected superconducting characteristic may be related to the lack of an inversion center in its crystal structure.
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