Critical Field Anisotropy of a Single Crystal GdBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> and HoBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub>
Yasuhiro IyeThe Institute for Solid State Physics, The University of TokyoT. TamegaiThe Institute for Solid State Physics, The University of TokyoHiroyuki TakeyaThe Institute for Solid State Physics, The University of TokyoHumihiko TakeiThe Institute for Solid State Physics, The University of Tokyo
1987en
ABI
Annotatsiya
A study of anisotropic critical field has been carried out on single crystal samples of GdBa 2 Cu 3 O x and HoBa 2 Cu 3 O x . The angular dependence of the upper critical field can be fitted to the anisotropic Ginzburg-Landau model. The anisotropy ratio H c2 ⊥ / H c2 // depends somewhat on the definition of H c2 and is also temperature dependent, but it generally falls between 3 and 7. The superconducting properties of GdBa 2 Cu 3 O x and HoBa 2 Cu 3 O x are almost identical with that of YBa 2 Cu 3 O x which we reported earlier, except for small differences in T c .
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