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Residual Resistivity Measurements on High RRR Aluminum by the Eddy Current Decay Method

  • K. T. Hartwig
  • H. Zou
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 40)

Abstract

Measurements of resistivity at 4.2 K by the eddy current decay (ECD) method on high RRR aluminum reveal that the ECD primary coil field level may influence results. Measurements are reported for magnetic flux densities of 40 to 400 gauss, on large polycrystalline specimens with nominal RRR values of 5000 and 10,000 as well as on large 15,000-20,000 RRR single crystal specimens. The true “zero-field” resistivity (p“) is determined by extrapolation. A graphical method for determining approximate po values from one measurement of resistivity is presented along with a listing of approximate errors for resistivity measurements at various field levels.

Keywords

Flux Density Pure Aluminum Residual Resistivity Field Level Secondary Coil 
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References

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    A.F. Clark, V.A. Deason, J.G. Hust, and R.C. Powell, “Standard Reference Materials: the Eddy Current Decay Method for Resistivity Characterization of High Purity Metals,” NBS Special Publication 260–39, National Bureau of Standards, Washington, DC (1972).Google Scholar
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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • K. T. Hartwig
    • 1
  • H. Zou
    • 1
  1. 1.Department of Mechanical EngineeringTexas A&M UniversityCollege StationUSA

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