LOW TEMPERATURE MAGNETIC FORCE MICROSCOPY STUDY OF VORTEX IN A YBa_2Cu_3O_(7-x) THIN FILM

A low temperature magnetic forc micro-scope for the study of high temperature superconductor isdeveloped. It has been applied to spatially resolve singlevortices at low temperature (77K) in a YBa_2Cu_3,O_(7-x). thinfilm deposited by laser ablation on a NdGaO_3 substrate.The images of disordered vortex arrangements are obtained. The movement of single vortices after a contactmode scanning of the detecting tip over the thin film sur-face is observed. The reason for the movement is dis-cussed.     

用低温磁力显微镜观察YBa2Cu3O7—x超导薄膜中的涡旋

用低温磁力显微镜观察ＹＢａ＿２Ｃｕ＿３Ｏ＿（７－ｘ）超导薄膜中的涡旋＠郑兆佳＠袁彩文￥武汉工业大学材料研究与测试中心￥美国德克萨斯大学（奥斯汀）物理系用低温磁力显微镜观察ＹＢａ２Ｃｕ３Ｏ７－ｘ超导薄膜中的涡旋郑兆佳袁彩文ＡｌｅｘｄｅＬｏｚａｎｎｅ（武汉工业...     

一种新的Y_1Ba_2Cu_3O_(7-δ)薄膜三端器件

设计研制了一种新的YBCO薄膜三端器件,该器件利用半导体硅薄膜与YBCO薄膜相接触,从而发现了微弱信号下的开关和放大效应.器件能在液氮或室温工作.器件制造工艺简单.