High Tc SQUID microscope head for room temperature sample
High Tc SQUID microscope head for room temperature sample
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用于室温样品的高 Tc SQUID 显微镜头
DOI：
10.1088/0953-2048/12/11/404
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发表时间：
1999
影响因子：
3.6
通讯作者：
H. Itozaki
中科院分区：
文献类型：
--
作者：
T. Nagaishi;H. Itozaki
设计并制作了一种新型高温超导量子干涉仪显微头。蓝宝石棒直接用液氮冷却，液氮通过玻璃钢制成的液氮罐。实现了一种无波纹管的简单结构，其具有相互螺纹连接的内壳和外壳，用于SQUID和窗口之间的间隔调节。样品可以接近SQUID不到1 mm。我们通过测量直径为70 µm的磁化铁颗粒的磁场来证明SQUID显微镜的性能，并与5 mm的提离距离的结果进行比较。测量的磁场增加了50倍，检测能力大大增强。
We designed and constructed a new type of high Tc SQUID microscope head. The sapphire rod is directly cooled with the liquid nitrogen which passes through a liquid nitrogen tank made of glass fibre reinforced plastic. A bellows free simple structure is realized with mutually screwed inner and outer enclosures for separation adjustment between a SQUID and a window. A sample can be as close to the SQUID as less than 1 mm. We demonstrated the performance of this SQUID microscope by the measurement of a magnetic field from a 70 µm diameter magnetized iron particle compared with the result of a lift-off distance of 5 mm. The measured magnetic field was increased 50-fold and the detection ability was enhanced drastically.