Vortex Motion In Type-Ii Superconductors Probed By Muon Spin Rotation And Small-Angle Neutron Scattering

We report muon spin rotation (muSR) measurements on the moving vortex lattice (VL) in the type-II superconductor Pb-In, backed up by small-angle neutron scattering (SANS) observations on the same sample. We observe a motional narrowing of the muSR lineshape p(B) and by SANS, alignment of the VL to the direction of vortex motion. We have calculated the muSR lineshape expected with a range of orientations of the moving VL. We demonstrate how the new muSR results give information on the moving VL which is complementary and consistent with the SANS data.