Growth of laser ablated Yba_2Cu_3O_7 thin films epitaxied on (100)MgO: influence of in-plane misorientations on low and high frequency properties

摘要

The graphoepitaxial growth of c-axis Yba_2Cu_3O_7 laser ablated thin films on (100)MgO induces a competition between two main in-plane orienta- tions due to the large lattice mismatch: (100) Yba_2Cu_3O_7 ||(100) MgO, c⊥o notation or <110> Yba_2Cu_3O_7||<100> MgO, c⊥45 notation. The ratio of c⊥45/c⊥o in-plane orientations (η), measured by X-ray diffraction φ scans, is ranging from 0.2/100 to 49.7/100 for the films reported here.