HRXRD analysis for YBa2Cu3O7-x deposited on {001} LaAlO3

YBa2Cu3O7-x (YBCO) superconducting film was fabricated on {001} LaAlO3 (LAO) substrate by pulse laser deposition (PLD), and its microstructure was examined by high resolution X-ray diffraction technology (HRXRD), such as pole figure, rocking curve, reciprocal space mapping. The results show that the YBCO crystalline alignment is almost {001}YBCO//{001}LAO, 〈100〉YBCO//〈100〉LAO besides 2% {001}YBCO//{001}LAO, 〈110〉YBCO//〈100〉LAO. The out-plane alignment of YBCO is some spreading (the breadth is 0.75°). There are 90°±0.65°〈110〉 twin domains in the film, which is caused by the high local stress and stress difference between 〈100〉 and 〈010〉 during the tetragonal to orthorhombic phase transition.