Physics – Condensed Matter – Superconductivity
Scientific paper
2006-01-15
J. Phys. Soc. Jpn. 75 (2006) 013709
Physics
Condensed Matter
Superconductivity
4pages, 4figures
Scientific paper
10.1143/JPSJ.75.013709
We report the measurements of the $^{29}$Si Knight shift $^{29}K$ on the noncentrosymmetric heavy-fermion compound CePt$_{3}$Si in which antiferromagnetism (AFM) with $T_{\rm N}=2.2$ K coexists with superconductivity (SC) with $T_{c}=0.75$ K. Its spin part $^{29}K_{\rm s}$, which is deduced to be $K_{\rm s}^{c}\ge 0.11$ and 0.16% at respective magnetic fields $H=2.0061$ and 0.8671 T, does not decrease across the superconducting transition temperature $T_{c}$ for the field along the c-axis. The temperature dependence of nuclear spin-lattice relaxation of $^{195}$Pt below $T_{c}$ has been accounted for by a Cooper pairing model with a two-component order parameter composed of spin-singlet and spin-triplet pairing components. From this result, it is shown that the Knight-shift data are consistent with the occurrence of the two-component order parameter for CePt$_{3}$Si.
Bauer Ernst
Haga Yoshinori
Hashimoto Shin
Kitaoka Yoshio
Matsuda Tatsuma D.
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