用于室温样品的扫描SQUID显微镜的研制  

Research on a Scanning Superconducting Quantum Interference Device Microscope for Room Temperature Samples

作　　者：丁红胜[1] 何豫生[2] 张峰会[2] 韩士吉[2] 董世迎[2] 陈赓华[2] 于洪伟[2] 

机构地区：[1]北京科技大学应用科学学院,北京100083 [2]中国科学院物理研究所,北京100080

出　　处：《应用科学学报》2004年第4期528-532,共5页Journal of Applied Sciences

基　　金：国家基金委首批大型仪器研制(19827001);北京科技大学科研专项发展基金(20030602290)资助项目

摘　　要：成功制备了用于室温样品磁测量的扫描SQUID显微镜.SQUID利用YBCO薄膜制成,并安装在双层杜瓦内胆的底部冷指端.为了提高系统的空间分辨率,杜瓦设计了特殊的微调装置和白宝石窗口.该显微镜可在无屏蔽环境中工作,其磁场灵敏度约为46pT/Hz1/2,空间分辨率优于500μm.利用该显微镜成功实现了室温样品的弱磁测量,并进行了无损检测的应用研究.We have constructed a scanning high-Tc superconducting quantum interference device (SQUID) microscope for room temperature samples, in which YBCO DC SQUID is mounted on the lower end of a copper rod and cooled to liquid nitrogen temperature. There is a 75 μm thick sapphire window under the SQUID. The microscope has a magnetic field sensitivity of 46pT/Hz^(1/2) in a magnetically unshielded environment and the spatial resolution is better than 500 μm. We have used this scanning SQUID microscope to measure various room temperature samples, especially for non-destructive evaluation.

关 键 词：高温超导量子干涉器 磁测量 显微镜 无损检测 凝聚态物理学 

分 类 号：TH741.8[机械工程—光学工程] O469[机械工程—仪器科学与技术]