Point contact tunnelling apparatus with temperature and magnetic field control

被引：23

作者：

Ozyuzer, L ^{[1
]}

Zasadzinski, JF

Gray, KE

机构：

[1] Argonne Natl Lab, Sci & Technol Ctr Superconduct, Argonne, IL 60439 USA

[2] IIT, Chicago, IL 60616 USA

来源：

CRYOGENICS | 1998年 / 38卷 / 09期

基金：

美国国家科学基金会;

关键词：

tunnelling spectroscopy; superconductors; cryostat;

D O I：

10.1016/S0011-2275(98)00060-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The design and testing of a new device for point contact tunnelling measurements in superconductors are described. The insert is designed for use with a continuous flow cryostat which allows for a large range of sample temperatures from 1.5 K to room temperature. The use of nonmagnetic parts allows tunnelling measurements to be performed in high magnetic fields. Testing was carried out on a conventional super conductor, Nb, in fields up to 6 T using Nb and Au tips to obtain superconductor-insulator-superconductor and superconductor-insulator-normal metal junctions. In addition, a moderate-T-c oxide superconductor, Ba1-xKxBiO3', was used to obtain temperature and magnetic field dependencies of the energy gap. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：911 / 915

页数：5

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