C59o NMR shift anomalies and spin dynamics in the normal state of superconducting CeCoIn5: Verification of two-dimensional antiferromagnetic spin fluctuations
Hironori Sakai, Seung-Ho Baek, Stuart E. Brown, Filip Ronning, Eric D. Bauer, Joe D. Thompson
DOI 10.1103/PhysRevB.82.020501 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We have measured the Knight shifts (K) and nuclear relaxation times (T1) for C59o in CeCoIn5 under external fields along a and c axes with the goal of establishing the anisotropy of antiferromagnetic (AFM) spin fluctuations (SF). In our approach, we revisit the problem of interpreting anomalies in the relationship between Knight shift Ka,c and static susceptibility χa,c: assuming a single component susceptibility implies a temperature-dependent hyperfine coupling Aa,c(T). Once adopted, a known discrepancy between the behaviors of T1−1 for C59o and I115n(1) sites is eliminated to within experimental uncertainties and the variation with temperature is analyzed within the framework of two-dimensional AFM SF in proximity to a quantum-critical point. Moreover, the ratio [T1a/T1c] indicates easy-plane anisotropy for T<T∗∼40 K, for the heavy-fermion state.
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 |
| PuCoGa5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18.5 | Pressure not reported | unknown |
| PuRhGa5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure not reported | unknown |
Similar papers
Magnetic-Field-Induced Enhancements of Nuclear Spin-Lattice Relaxation Rates in the Heavy-Fermion Superconductor CeCoIn5 Using Co59 Nuclear Magnetic Resonance
similarity 0.97H. Sakai et al.
Source status unknown — claims are unverified
Switching dynamics of the spin density wave in superconducting CeCoIn5
similarity 0.96Duk Y. Kim et al.
Source status unknown — claims are unverified
Nonmagnetic impurity resonance states as a test of superconducting pairing symmetry in CeCoIn5
similarity 0.95Bin Liu
Source status unknown — claims are unverified
Magnetic field tuned superconducting and normal-phase magnetism in CeCo0.5Rh0.5In5
similarity 0.95A. Howell et al.
Source status unknown — claims are unverified
Anomalous superconductivity and field-induced magnetism in CeCoIn5
similarity 0.95T. P. Murphy et al.
Source status unknown — claims are unverified
Unconventional heavy-fermion superconductor CeCoIn5: dc magnetization study at temperatures down to 50 mK
similarity 0.95T. Tayama et al.
Source status unknown — claims are unverified