17O Knight shift study in the superconducting state of Sr2RuO4 |
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| Authors: | H. Mukuda K. Ishida Y. Kitaoka Z. Mao Y. Mori Y. Maeno |
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| Affiliation: | (1) Dept. of Phys. Sci., Grad. school Engr. Sci., Osaka Univ., Osaka, 560-8531, Japan;(2) Dept. of Physics, Grad. School Sci., Kyoto Univ., Kyoto, 606-8502, Japan;(3) CREST-JST, Kawaguchi, Saitama, 332-0012, Japan |
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| Abstract: | 17O Knight shift measurements in Sr2RuO4 were performed over the wide range of magnetic field 3.2-11.4kOe parallel to the basal RuO2 planes. The spin susceptibility is totally unchanged through its Tc, evidencing that the spin-triplet superconducting state is realized in Sr2RuO4. The result indicates that the Cooper pairs consist of the parallel spin pairs |  > and |  > with their quantization axis perpendicular to the c-axis direction. The in-plane 2D nearly ferromagnetic spin fluctuations may play a role for the stabilization of this state among various representations of spin-triplet order parameter. |
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