Inductive Method for Measuring the Local Transition Temperature of Thin Tungsten Films.
- Resource Type
- Article
- Authors
- Schäffner, Karoline; Angloher, Godehard; Hauff, Dieter; Pröbst, Franz; Seidel, Wolfgang
- Source
- AIP Conference Proceedings. 12/16/2009, Vol. 1185 Issue 1, p187-190. 4p.
- Subject
- *TUNGSTEN
*THIN films
*TEMPERATURE measurements
*INTERSTELLAR medium
*CHROMIUM group
- Language
- ISSN
- 0094-243X
We report on a method for local transition temperature (Tc) measurements of thin tungsten films operated at temperatures down to 10 mK in a dilution refrigerator. The experimental set-up is designed to study possible inhomogeneities in such films as used in the framework of the CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) dark matter search. The method uses a probe coil which is positioned close to the tungsten sample in order to measure the coil’s change of inductance when the sample changes from the normal to the superconducting state. We have demonstrated that stationary local transition temperature measurements on a tungsten single crystal as well as on thin tungsten films work and allow the study of the local dependence of Tc. We are now preparing a set-up using a slip-stick step-scanner to enable the mapping of the Tc-distribution of a superconducting tungsten film in one cooldown. [ABSTRACT FROM AUTHOR]