A scanning SQUID microscope for samples at room temperature

被引：16
|
作者：
Dechert, J [1 ]
Mueck, M [1 ]
Heiden, C [1 ]
机构：
[1] Univ Giessen, Inst Phys Appl, D-35390 Giessen, Germany
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1999年 / 9卷 / 02期
关键词：
D O I：
10.1109/77.783930
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 report on the development of a scanning SQUID microscope for measurements of samples at room temperature. A thin film niobium DC-SQUID is used with conventional read-out electronics. It is placed above the thin bottom window of a fiberglass cryostat, allowing us to realize a distance of about 75 mu m between SQUID and sample. The evaporation rate for the liquid helium was about 0.3 l/h, Because the effective SQUID area can easily be brought below 10 mu m(2), the obtainable spatial resolution of such a scanning SQUID microscope is limited mainly by the distance between SQUID and sample. The sample is moved under the cryostat with a computer controlled XY-stage. Provisions are made for quick sample changes which are important for the practical application of such a device.
引用
收藏
页码：4111 / 4114
页数：4
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