Low-field cross spin relaxation of L8i in superconducting NbSe2
M. D. Hossain, Z. Salman, D. Wang, K. H. Chow, S. Kreitzman, T. A. Keeler, C. D. P. Levy, W. A. MacFarlane, R. I. Miller, G. D. Morris, T. J. Parolin, M. Pearson, H. Saadaoui, R. F. Kiefl
DOI 10.1103/PhysRevB.79.144518 · Physical Review B
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Abstract
A low energy beam of spin polarized L8i has been used to investigate nuclear spin relaxation in the multiband superconductor NbSe2. In low magnetic fields there is significant cross relaxation between the L8i and the host N93b spins, which is driven by low frequency fluctuations in the nuclear magnetic dipolar interaction. The rate of cross relaxation is strongly field dependent and thus the 1/T1 spin relaxation rate of the L8i is a sensitive monitor of the static local magnetic field B just below the surface. This in turn is used to determine the absolute value of the magnetic penetration depth λ in the Meissner state. The temperature variations in 1/T1 and λ are consistent with a wide distribution of superconducting gaps expected for a multiband superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | onset |
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