Magnetic-Field-Induced Enhancements of Nuclear Spin-Lattice Relaxation Rates in the Heavy-Fermion Superconductor CeCoIn5 Using Co59 Nuclear Magnetic Resonance
H. Sakai, S. E. Brown, S.-H. Baek, F. Ronning, E. D. Bauer, J. D. Thompson
DOI 10.1103/PhysRevLett.107.137001 · Physical Review Letters
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Abstract
Co59 nuclear spin-lattice relaxation has been measured for the heavy-fermion superconductor CeCoIn5 in a range of applied fields directed parallel to the c axis. An enhanced normal-state relaxation rate, observed at low temperatures and fields just above Hc2(0), is taken as a direct measure of the dynamical susceptibility and provides microscopic evidence for an antiferromagnetic instability. The results are well described using the self-consistent renormalized theory for two-dimensional antiferromagnetic spin fluctuations, and parameters obtained in the analysis are applied to previously reported specific heat and thermal expansion data with good agreement.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | unknown |
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