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Author List, F. A. ♦ Martin, P. M. ♦ Kroeger, D. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS ♦ HIGH-TC SUPERCONDUCTORS ♦ ELECTRICAL PROPERTIES ♦ ELECTRIC MEASURING INSTRUMENTS ♦ CERAMICS ♦ BISMUTH OXIDES ♦ STRONTIUM OXIDES ♦ CALCIUM OXIDES ♦ COPPER OXIDES ♦ MAGNETIC FIELDS ♦ TEMPERATURE RANGE 0-13 K ♦ TEMPERATURE RANGE 65-273 K
Abstract An automated system for determinations of transport current{endash}voltage ({ital I}{endash}{ital V}) characteristics as a function of temperature (25{endash}125 K), magnetic field (0{endash}1.6 T), and magnetic field orientation ({minus}125 to +145{degree}) is described. Currents of up to 100 A are applied either as a continuous ramp or as pulses of 2{endash}100 ms duration. A closed-cycle helium refrigerator provides a rapid ({approximately}45 min), convenient, cost effective, cooldown from 300 to 25 K. Control of current, temperature, magnetic field, and field orientation is fully automated and requires no user interaction. The characterization of performance of a ceramic superconductor typically involves several temperatures, fields, and orientations and requires 8{endash}30 h to complete. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-09-01
Publisher Department Oak Ridge National Laboratory
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 67
Issue Number 9
Organization Oak Ridge National Laboratory


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