High-precision resistance ratio measurements by means of a novel Josephson potentiometer

Non-decadic resistance ratios can be determined with high accuracy by means of a novel Josephson potentiometer. The advantage of this potentiometric method has been demonstrated by the first measurements of the resistance ratio 12.9 kΩ. to 10 kΩ of the quantized Hall resistance, step i = 2, of a GaA...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 1987-06, Vol.IM-36 (2), p.249-251
Main Authors: Warnecke, Peter, Niemeyer, Jurgen, Dunschede, Friedrich Wilhelm, Grimm, Lambert, Weimann, G., Schlapp, W.
Format: Article
Language:English
Subjects:
Arrays
Cryogenics
Current measurement
Electrical resistance measurement
Resistance
Resistors
Voltage measurement
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Non-decadic resistance ratios can be determined with high accuracy by means of a novel Josephson potentiometer. The advantage of this potentiometric method has been demonstrated by the first measurements of the resistance ratio 12.9 kΩ. to 10 kΩ of the quantized Hall resistance, step i = 2, of a GaAs-Ga 1−x Al x As-heterostructure and a 10-kΩ cryogenic resistor. The limitation of the described method is given by the noise voltages which are generated by the room-temperature electronic null detector. Considerable improvement is anticipated by replacing the electronic null detector by a highly sensitive superconducting quantum interference device (SQUID) instrument.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.1987.6312679