Corbino Reflector

Continuous flow cryostat cold finger with Corbino reflection probe on the end. Also shown is a stainless steel coaxial cable which connects to an HP 8510C vector network analyzer. This apparatus is used to measure the frequency, temperature and magnetic field dependence of the microwave conductivity of superconducting samples between 45 MHz and 50 GHz.

For more information about the Corbino reflectometer, see J. C. Booth, et al., Phys. Rev. Lett. 77, 4438-4441 (1996).

A detailed discussion of this experiment can be found in J. C. Booth, D. H. Wu, S. M. Anlage, "A Broadband Method for the Measurement of the Surface Impedance of Thin Films at Microwave Frequencies," Rev. Sci. Instrum., 65, 2082-2090 (1994).

We wish to acknowledge the NSF Division of Materials Research for supporting this research under NSF MRSEC DMR 9632521 and the NSF Division of Electrical and Communication Systems for supporting this research under NSF ECS 9632811. We also acknowledge support from the Maryland MIPS program and the DARPA TASS program.

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Center for Superconductivity Research, University of Maryland, College Park, MD 20742-4111
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