Langevin-dynamics study of nuclear relaxation to vortices in a layered superconductor

D. Reefman; H. B. Brom

doi:10.1103/PhysRevB.48.3567

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Langevin-dynamics study of nuclear relaxation to vortices in a layered superconductor

D. Reefman, H. B. Brom

DOI 10.1103/PhysRevB.48.3567 · Physical Review B

T1

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Abstract

We have investigated the possibility of nuclear relaxation due to the magnetic field fluctuations induced by thermal motion of (pancake) vortices in a layered superconductor with a Langevin dynamics method. Only magnetic interactions between layers were taken into account. We found that for low fields the vortex lattice (VL) is rigid and hardly affects the relaxation time T1. At higher vortex densities, for fields actually used in experimental NMR studies, effects may be visible. At the melting temperature of the VL a peak in the relaxation rate is observed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tl2Ba2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	12	Pressure not reported	unknown