在金属基片上激光沉积YBCO超导薄膜

YBCO Superconducting Thin Film Preparation on Metallic Substrates by Laser

介绍了在金属基片上激光沉积缓冲层和ＹＢａ２Ｃｕ３Ｏ７－ｘ（ＹＢＣＯ）高温超导薄膜的研究结果。在带ｙｔｒｉａ－ｓｔａｂｉｌｉｚｅｄ－ｚｉｒｃｏｎｉａ（ＹＳＺ）缓冲层的ＮｉＣｒ合金基片上，激光原位沉积出ＹＢＣＯ超导薄膜，薄膜的零电阻转变温度为８４Ｋ，７７Ｋ时临界电流密度约为２０００Ａ／ｃｍ２；缓冲层的取向可以通过选择适当的沉积参数来改善；

YBa 2Cu 3O 7-x (YBCO) superconducting thin films with T c (R=0) of 84 K and J c of 2×10 3 A/cm 2 at 77 K, on polycrystalline Ni based alloys with buffer layers of yttria stabilized zirconia (YSZ), are prepared in situ by excimer laser and primarily c axis oriented. The orientation of laser deposited YSZ buffer layers on NiCr alloys can be improved by choosing the suitable preparing parameters. The microstructure of the YBCO thin films, investigated with a scanning tunneling microscopy, shows that the spiral growth structure may be an important characteristic of the high quality YBCO superconducting thin films.