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Anomalous NMR Magnetic Shifts in CeCoIn_5

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arxiv cond-mat/0105175 v2 pith:DJAVA4QH submitted 2001-05-08 cond-mat.str-el cond-mat.supr-con

N. J. Curro , B. Simovic , P. C. Hammel , P. G. Pagliuso , G. B. Martins , J. L. Sarrao , J. D. Thompson This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords belowcecoinchangesmagneticaboveanisotropicanomalouscouplings
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We report ^{115}In and ^{59}Co Nuclear Magnetic Resonance (NMR) measurements in the heavy fermion superconductor CeCoIn_5 above and below T_c. The hyperfine couplings of the In and Co are anisotropic and exhibit dramatic changes below 50K due to changes in the crystal field level populations of the Ce ions. Below T_c the spin susceptibility is suppressed, indicating singlet pairing.

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