The Anisotropic Upper Critical Field of Single Crystal YBa2Cu3Ox
- 1 June 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (6A), L1057
- https://doi.org/10.1143/jjap.26.l1057
Abstract
We report a study of anisotropic upper critical field of single crystal samples of orthorhombic YBa2Cu3O x . The critical field shows anisotropy characteristic of a quasi-two-dimensional superconductor, and is highest when the field is oriented perpendicular to the c-axis. For this field direction, the zero resistance state persists up to 86 K in a magnetic field of 90 kOe, which is lower by only 5 K than the zero resistance temperature in the absence of magnetic field. The anisotropy H c2 ⊥/H c2 // is about 2 at 90 K, 5 at 86.5 K and tends to increase with decreasing temperature.Keywords
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