Abstract
The muon-spin-relaxation technique has been used to study vortex dynamics in single-phase superconducting single crystals of (≊90 K). The data indicate motional narrowing of the internal field distribution due to vortex motion (on a time scale comparable to the muon lifetime). A field-dependent lattice transition is also observed at ∼30 K, as evidenced by the onset of an asymmetric line shape below . Narrowing arising from disordering of the vortices along [001] is also discussed with reference to its effect on the measured penetration depth.
- Received 2 January 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.3152
©1991 American Physical Society