NMR investigation of the quaternary-intermetallic-compound superconductor YNi2B2C
M. E. Hanson, F. Lefloch, W. H. Wong, W. G. Clark, M. D. Lan, C. C. Hoellwarth, P. Klavins, R. N. Shelton
DOI 10.1103/PhysRevB.51.674 · Physical Review B
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Abstract
Measurements of the B11 NMR spectrum, isotropic Knight shift (Ki), and spin-lattice relaxation rate (1/T1) in an unoriented powder sample of YNi2B2C are reported in the normal and the superconducting states. In the normal state, Ki varies linearly from (+5.7±0.7) × 10−4 at 300 K to (+4.9±0.7)×10−4 just above the superconducting transition temperature. The anisotropic Knight shift, if present, is substantially smaller than Ki. An anomalous increase in (T1T)−1 with decreasing temperature (T) is found in the normal state. From the behavior of the NMR linewidth in the superconducting state, the low-temperature limit λ(0)=(108±5) nm is found for the penetration depth. At the superconducting transition, 1/T1 drops rapidly and no Hebel-Slichter peak is seen.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.5 | Pressure unresolved | onset |
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.2 | Pressure not reported | unknown |
| LuNi2B2C 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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