YBa 2Cu 3O 7-delta superconducting films prepared by low pressure post-annealing

	YBa 2Cu 3O 7-delta superconducting films prepared by low pressure post-annealing
	Wang LH(王连红); Liu C(刘崇); Fan J(樊菁)
会议录名称	Proceedings of 29th International Symposium on Rarefied Gas Dynamics/AIP Conference Proceedings, v.1631
	2014
会议名称	The 29th International Symposium on Rarefied Gas Dynamics
会议日期	2014-07-13
会议地点	中国陕西西安
摘要	YBa2Cu3O7-deltaprecursor films are deposited on 2" LaAlO3wafer by the co-evaporation technique using Y, BaF2and Cu as evaporation sources. After deposition, the films are annealed at low-pressure atmosphere with the composition of oxygen and water vapour. Compared with the normal pressure annealing, it is shown that low pressure can greatly improve the superconducting properties of 2" YBCO films with thickness larger than 500 nm, as the microcrack on films surface becomes unobservable the microwave surface resistance is greatly reduced. Furthermore, it is also revealed that the optimal processing window for making high quality superconducting YBCO films through ex-situ process is relatively small, therefore the ambient in annealing furnace is crucial important and should be precisely controlled.
课题组名称	LHD微尺度和非平衡流动
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语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/55215
专题	高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Wang LH,Liu C,Fan J. YBa 2Cu 3O 7-delta superconducting films prepared by low pressure post-annealing[C]Proceedings of 29th International Symposium on Rarefied Gas Dynamics/AIP Conference Proceedings, v.1631,2014.

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