Publications in Scientific Journals:

M. Yogi, Y. Kitaoka, S. Hashimoto, T. Yasuda, R. Settai, T.D. Matsuda, Y. Haga, Y. Onuki, P. Rogl, E. Bauer:
"Novel superconductivity in noncentrosymmetric heavy-fermion compound CePt3Si: a 195Pt-NMR study";
Physica B: Condensed Matter, 359-361 (2005), 389 - 391.

English abstract:
Novel superconductivity in noncentrosymmetric heavy-fermion compound CePt3Si: a 195Pt-NMR study

M. Yogi a, Y. Kitaoka a, S. Hashimoto b, T. Yasuda b, R. Settai b, T.D. Matsuda c, Y. Haga c, Y. Onuki b, c, P. Rogl d and E. Bauer e

a Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
b Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
c Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
d Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria
e Institut für Physikalische Chemie, Universität Wien, A-1090 Wien, Austria

Available online 5 February 2005.


We report on a 195Pt-NMR study of the antiferromagnetic heavy-fermion (HF) superconductor CePt3Si without an inversion center. The measurements of the nuclear spin-lattice relaxation rate 1/T1 has revealed a uniform coexistence of antiferromagnetism and superconductivity. CePt3Si is the first HF superconductor that reveals a peak in 1/T1 just below Tc and, additionally, does not follow the T3 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.

Keywords: Heavy-fermion superconductivity; Antiferromagnetism; NMR; Nuclear relaxation

PACS: 74.70.Tx; 71.27.+a; 74.25.Ha; 76.60.-k

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