Ma X L, Yamagiwa K, Shibata J, Hirayama T, Hirabayashi I, Ikuhara Y
Japan Fine Ceramics Center, Nagoya, Japan.
J Electron Microsc (Tokyo). 1999;48(6):785-9. doi: 10.1093/oxfordjournals.jmicro.a023749.
Thin superconducting films of the YbBa2Cu3O7-y (Yb123) and YBa2Cu3O7-y (Y123), prepared by post-deposition annealing of the metal naphthenates gels spin-coated on MgO(001) substrate, have been characterized by cross-sectional high-resolution electron microscopy and X-ray diffraction. It was found that the c-axis Yb123 films were epitaxially grown on the MgO(001) substrate at the temperature range from 700 degrees C to 775 degrees C in a gas mixture containing Ar and O2 with the oxygen partial pressure of p(O2) = 10(-4) atm. In contrast to the Yb123 films, it was found that Y123 films could be derived at a wider temperature range from 750 degrees C to 950 degrees C. Randomly oriented Y123 films were also grown on the MgO(001) substrate besides the majority of in-plane c-axis oriented growth.
通过将环烷酸金属凝胶旋涂在MgO(001)衬底上并进行沉积后退火制备的YbBa2Cu3O7-y（Yb123）和YBa2Cu3O7-y（Y123）超导薄膜，已通过截面高分辨率电子显微镜和X射线衍射进行了表征。研究发现，在含有Ar和O2且氧分压p(O2)=10^(-4) atm的气体混合物中，c轴Yb123薄膜在700℃至775℃的温度范围内在MgO(001)衬底上外延生长。与Yb123薄膜不同，研究发现Y123薄膜可以在750℃至950℃的更宽温度范围内获得。除了大多数面内c轴取向生长外，随机取向的Y123薄膜也在MgO(001)衬底上生长。
