Surface morphology is observed for a superconducting YBa2Cu3Ox (YBCO) thin film grown on a 1.7° off angle vicinal surface of lattice-matched NdGa03 substrate. Ragged step-like edges are clearly observable with exclusions in the front of the edges. The height of a step is measured to be 20 Å 30 Å and is calculated from the vicinal angel and the terrace width to be 23 ±2 Å, indicating an evidence for a doubled periodicity of YBCO crystal c-axis unit length of 12 Å.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)