Largely Anisotropic Superconducting Critical Current in Epitaxially Grown Ba2YCu3O7-y Thin Film
Abstract
Ba2YCu3O7-y (BYCO) thin films have been epitaxially grown on SrTiO3 substrates by magnetron sputtering. The films exhibit zero resistance at 84 K, with a transition width of 6 K. The resistivity along the basal plane is one order of magnitude smaller than that along the c-axis, and the transport property is more metallic in the former direction. Furthermore, the critical current density is two order of magnitudes larger in the former direction than in the latter direction. These results strongly suggest a quasi-two-dimensional electronic structure in BYCO. The maximum critical current at the liquid nitrogen temperature has reached 1.8× 106 A/cm2.
- Publication:
-
Japanese Journal of Applied Physics
- Pub Date:
- July 1987
- DOI:
- 10.1143/JJAP.26.L1248
- Bibcode:
- 1987JaJAP..26L1248E
- Keywords:
-
- Electric Current;
- Epitaxy;
- Mixed Oxides;
- Oxide Films;
- Superconducting Films;
- Superconductors;
- Thin Films;
- Barium Oxides;
- Copper Oxides;
- Current Density;
- Electrical Resistivity;
- Magnetron Sputtering;
- Yttrium Oxides;
- Solid-State Physics