The magnetic field structure of vortices in the mixed state of a lead-indium alloy and of niobium was probed by stopped μ+ particles. Fourier transforms of time-dependent spin-precession data contain a peak at the average internal field, which is also the applied field. For the alloy only there is a second peak at the saddle point of the internal field distribution. Motional averaging due to quantum diffusion of the muons at low temperatures can account for these results.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)