Local field distribution in YNi2B2C superconductor

Abstract

Local field distribution in the mixed state of type II superconductors has been numerically calculated and compared with 11B NMR spectra for YNi2B2C single crystals. We find that only small distortion of vortex positions from the perfect lattice points is enough to smear out the low frequency shoulder. It is found that the second moment of the field distribution has a major contribution from the high frequency tail. Consequently, a linewidth calculated from the second moment assuming for a Gaussian line shape is overestimated.