DESIGN AND IMPLEMENTATION OF A SCANNING SQUID MICROSCOPE

被引：59
|
作者：
Vu, L. N. [1 ]
Van Harlingen, D. J. [1 ]
机构：
[1] Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期
基金：
美国国家科学基金会;
关键词：
Magnetic imaging - Motor-controlled manipulators - Scanning microscopes - SQUID detectors - SQUID microscopes - Superconductor arrays;
D O I：
10.1109/77.233586
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We have developed a cryogenic two-dimensional magnetic imaging system that incorporates a sensitive dc SQUID detector. In this instrument, which we call the Scanning SQUID Microscope (SSM), a flux transformer coupled to the SQUID is scanned over the surface of a planar sample by a room temperature, stepping motor controlled manipulator with a positional resolution of about 2 mu m. With our present input coil, spatial resolution of 20 mu m and a flux sensitivity at the sample of 10(-5)Phi(0)/Hz(1/2) is attainable. This system has been specifically designed to image the vortex structure and dynamics of weakly-coupled superconductor arrays.
引用
收藏
页码：1918 / 1921
页数：4
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