Abstract
We investigate the behavior of the thermal conductivity κ(H) of both twinned and untwinned single crystals of in a magnetic field. Remanant field data are examined in the framework of the Bean critical state model and thermally activated flux creep. In-field data are shown to depart from conventional superconductor models. The κ(H) profie is fitted by a phenomenological form and is suggested to originate from Bloch wave travel of phonons through a vortex array which becomes more regular as the field increases.
- Received 16 September 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.3856
©1991 American Physical Society