Dynamical magnetic susceptibility in antiferromagnet UPtGa5 determined by NMR: Comparison with isostructural superconducting CeMIn5 systems
S. Kambe, T. Hattori, H. Sakai, Y. Tokunaga, R. E. Walstedt
DOI 10.1103/PhysRevB.93.205155 · Physical Review B
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Abstract
We report, as an example, a complete analysis of nuclear spin-lattice relaxation time (T1) data for the strongly correlated antiferromagnet UPtGa5, which has a typical HoCoGa5 (115) structure. Using a high-quality single-crystal sample, the T dependence of T1 at Pt195 and at two crystallographically inequivalent Ga69 sites has been measured for H∥a and c axes. Using previously obtained hyperfine coupling tensors from static Knight shift results, the anisotropic spin fluctuation energy and q⃗ dependence of the dynamic susceptibility have been determined completely, forming a clear contrast to the cases of superconducting CeRhIn5,CeCoIn5, and CeIrIn5, which are considered to be very near to a quantum critical point. We also note that a similar hyperfine coupling scheme to that of CeRhIn5 has been found for UPtGa5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UPtGa5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CeRhIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CeIrIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| PuCoGa5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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