CAJ | 학술논문

采用脉冲激光沉积技术(PLD)在{001} LaAlO3(LAO)衬底上生长YBa2Cu3O7-x(YBCO)薄膜,并通过极图、摇摆曲线以及倒易空间图谱等高分辨X射线衍射技术(HRXRD)对其微结构进行表征.结果表明,YBCO薄膜的晶粒取向主要为{001}YBCO//{001}LAO,〈100〉YBCO//〈 100〉LAO,但还有2％的{001}YBCO//{001}LAO,〈 110〉YBCO//〈100〉LAO取向.摇摆曲线结果表明,YBCO的面外取向有一定的漫散(宽度为0.75°);薄膜面内存在90°±0.65° 〈110〉孪晶畴结构,主要是由四方到正交的相变过程中较大的局部应力以及<100〉和〈010〉方向应力差异引起的.
채용맥충격광침적기술(PLD)재{001} LaAlO3(LAO)츤저상생장YBa2Cu3O7-x(YBCO)박막,병통과겁도、요파곡선이급도역공간도보등고분변X사선연사기술(HRXRD)대기미결구진행표정.결과표명,YBCO박막적정립취향주요위{001}YBCO//{001}LAO,〈100〉YBCO//〈 100〉LAO,단환유2％적{001}YBCO//{001}LAO,〈 110〉YBCO//〈100〉LAO취향.요파곡선결과표명,YBCO적면외취향유일정적만산(관도위0.75°);박막면내존재90°±0.65° 〈110〉련정주결구,주요시유사방도정교적상변과정중교대적국부응력이급<100〉화〈010〉방향응력차이인기적.
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}vaco//{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.