化学溶液方法制备涂层导体Ce_xLa_(1-x)O_2薄膜的研究

获得多功能单一过渡层是简化涂层导体多层结构的主要课题之一. 采用化学溶液方法制备La掺杂CeO₂过渡层，研究La掺杂量对CeO₂薄膜表面形貌和双轴取向生长的影响. 结果表明La掺杂量为10mol％的薄膜表面平整致密，且能保持锐利的双轴织构. 通过多次涂敷工艺，获得具有120nm厚的Ce_0.9La_0.1O₂过渡层. 采用脉冲激光沉积方法在Ce_0.9La_0.1O₂/NiW结构模板层上沉积了YBCO超导薄膜，其起始临界转变温度达到90.5K. 这表明采用化学溶液方法制备Ce_0.9La_0.1O₂薄膜是一种有前景的简化涂层导体多层结构的方法.

Study on Ce_xLa_(1-x)O_2 Buffer Layer used in Coated Conductors by Chemical Solution Method

Developing multi-functional single buffer layer is one of the most important challenges for simplification of coated conductors configuration. La-doped CeO_2 films were prepared by chemical solution method. And surface morphology and texture quality of the La-doped CeO_2 films were investigated in details. The results show that the as-obtained pore-free Ce_(0.9)La_(0.1)O_2 film are epitaxially deposited on the textured NiW substrate. The 120nm thickness Ce_(0.9)La_(0.1)O_2 film is obtained though multi-coating route. The YBCO film with T_(co)=90.5K, which is deposited on Ce_(0.9)La_(0.1)O_2/NiW metallic template by PLD method. It suggects that Ce_(0.9)La_(0.1)O_2 film prepared by chemical solution route have a promising prospect for the simplification of coated conductors configuration.