Improvements in the quantum Hall resistance standard at VTT

Alexandre Satrapinski, Aarne Oja, Heikki Seppä

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


    This paper describes improvements in the realisation of the quantum Hall effect (QHE) resistance standard at VTT and presents the results of the latest measurements. A new superconducting magnet and a new QHE sample were used to calibrate standard resistors in terms of RK-90, (RK-90=25812.807 Ω is the conventional value of the von Klitzing constant RK). A 100 Ω standard resistor was calibrated directly against the quantum Hall resistance (QHR) on i = 2 plateau using a low-frequency cryogenic ac resistance bridge based on the cryogenic current comparator (CCC). The same cryogenic ac bridge was used to trace the 1 Ω and 10 kΩ standard resistors from the 100 Ω standard.
    Original languageEnglish
    Title of host publication1998 Conference on Precision Electromagnetic Measurements Digest
    Place of PublicationWashington
    PublisherIEEE Institute of Electrical and Electronic Engineers
    ISBN (Print)0-7803-5018-9
    Publication statusPublished - 1998
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventConference on Precision Electromagnetic Measurements, CPEM 98 - Washington, DC, United States
    Duration: 6 Jul 199810 Jul 1998


    ConferenceConference on Precision Electromagnetic Measurements, CPEM 98
    CountryUnited States
    CityWashington, DC

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