Field structure of vortex lattices in uniaxial superconductors

Abstract

The magnetic field distribution within a primitive cell of the equilibrium flux-line lattice of a uniaxial superconductor is obtained for any orientation of vortex axes within the crystal in intermediate fields. The numerical procedure is described for mapping of both longitudinal and transverse field components with respect to the vortex axes (or to the direction of the induction B, which is the same). For a general orientation of B within the crystal, the transverse field, which is comparable in value to the longitudinal one in low fields, becomes small with respect to B in intermediate fields, but remains comparable to the variable part of the longitudinal component. The nuclear magnetic resonance line shapes are discussed for an arbitrary orientation of an intermediate external field.