Accuracy of measurements of the quantized Hall resistivity by a direct current comparator type potentiometer; Calibration using a Josephson potentiometer

Journal Article · Fri Mar 31 23:00:00 EST 1989 · IEEE (Institute of Electrical and Electronics Engineers) Transactions on Instrumentation and Measurement; (USA)

DOI:https://doi.org/10.1109/19.192287· OSTI ID:5147527

Inagaki, K; Sakamoto, Y; Endo, T ^[1]

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1. Electrotechnical Lab., 1-1-4 Umezono, Tsukuba-shi, Ibaraki 305 (JP)

In this paper the accuracy of measurements of the quantized Hall resistivity (QHR) by a direct current comparator type (DCC) potentiometer is estimated based on a linearity calibration of the potentiometer using a Josephson potentiometer. The power coefficient contribution to the nonlinearity of the DCC potentiometer is found to be 0.15 +- 0.02 ppm/(100 mV)/sup 2/ at 18.5 +-0.5{sup 0}C in 1985 and 0.21 +- 0.03 ppm/ (100 mV)/sup 2/ at 20.5 +-0.5{sup 0}C in 1988. The possibility of accurate measurements of the ratio QHR/R/sub std/ with uncertainties less than 0.05 ppm by the DCC potentiometer is discussed.

• OSTI ID: 5147527
• Journal Information: IEEE (Institute of Electrical and Electronics Engineers) Transactions on Instrumentation and Measurement; (USA), Journal Name: IEEE (Institute of Electrical and Electronics Engineers) Transactions on Instrumentation and Measurement; (USA) Vol. 38:2; ISSN IEIMA; ISSN 0018-9456
• Country of Publication: United States
• Language: English

Related Subjects

426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCURACY
CALIBRATION
CURRENTS
DIRECT CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
HALL EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
MEASURING INSTRUMENTS
MEASURING METHODS
NONLINEAR PROBLEMS
PHYSICAL PROPERTIES
POTENTIOMETERS
QUANTIZATION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY