Abstract
We have measured the electrical resistivity of in the vicinity of for various angles between the [ double layers of the crystal and the magnetic field. Defining at the transition midpoints, we have measured values for -/dT=45 T/K and -/dT=0.75 T/K for the magnetic field parallel and perpendicular to the [ planes, respectively. This results in an anisotropy of a factor 60. The numerical results are sensitive to the definition of and larger values for the anisotropy cannot be excluded. The results are compared with the anisotropic three-dimensional Ginzburg-Landau theory.
- Received 9 May 1988
DOI:https://doi.org/10.1103/PhysRevB.38.5102
©1988 American Physical Society