钇钡铜氧超导薄膜光诱导弛豫特性研究

摘要

采用TFA-MOD法在LaAlO3(LAO)单晶基底上制备了钇钡铜氧(YBCO)超导薄膜,利用X射线衍射对YBCO超导薄膜的结构进行了表征,并对其最佳沉积工艺进行了分析;研究了YBCO薄膜在不同温度和不同光功率下的光诱导特性.在光诱导下,YBCO薄膜出现了明显与电子体系相关的弛豫现象,说明薄膜的光致电阻变化与激光的功率有密切关系.%The superconducting thin film YBCO has been prepared on single crystal substrate LaAlO3 using TFArnMOD method. The XRD method is used to characterize the construction of superconducting thin film YBCO and rnwe get the best technology of deposition. The photoinduced properties of the film in different temperature and rnlaser power have been studied. The YBCO film obviously has the relaxation phenomenon related with electronic rnsystem under the laser irradiation. This proves that the superconducting state of the YBCO film is attributed to rnthe power of laser.