NDLI: Progress toward a low-noise temperature regulation using a superconductive high-T/sub c/ microbridge

Content Provider	IEEE Xplore Digital Library
Author	Lesquey, E. Gunther, C. Flament, S. Desfeux, R. Hamet, J.F. Robbes, D.
Copyright Year	2002
Abstract	Our results measuring I-V characteristics of YBCO/MgO microbridges show that large current sensitivities (10 mA/K) as a function of temperature can be obtained, roughly independently of the applied voltage V up to a few hundred mV. This offers the possibility of working with high values of the dynamic resistance so that the phonon noise associated to the thermal boundary resistance, located at the YBCO/MgO interface, becomes dominant. A noise equivalent temperature of 10/sup -8/ K//spl radic/Hz (T=85 K, f>1 kHz) has already been obtained in a 0.2/spl times/12/spl times/10 /spl mu/m/sup 3/ microbridge. We describe a process involving the periodical sampling of the I-V characteristics that eliminates 1/f amplifier noise and returns the current value (temperature dependent) at fixed voltage bias (/spl plusmn/1 mV). This output, locked to a reference voltage through a commercial temperature regulator, leads to temperature fluctuations less than 100 /spl mu/K/sub pp/ in a 10 Hz bandwidth. These results are promising to enhance performances of high-T/sub c/ microbolometers as infrared detectors.<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2427
Ending Page	2430
Page Count	4
File Size	368240
File Format	PDF
ISSN	10518223
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconductivity Voltage Thermal resistance Superconducting device noise Temperature sensors Yttrium barium copper oxide Current measurement Electrical resistance measurement Phonons Sampling methods
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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