Transverse Resistivities of Cu-Matrix and CuMn-Matrix Multifilamentary Strands as Functions of Magnetic Field and Temperature

  • M. D. Sumption
  • E. W. Collings
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 40)

Abstract

The transverse resistivities, ρ , of 2 μm filamentary diameter NbTi multifilamentary composites with Cu and CuMn matrices have been measured as functions of magnetic field strength and temperature. From magnetometry data, ρ was extracted from both: (i) the per-cycle eddy-current loss, Qe, and (ii) its associated field-dependent M-H loop height, ΔMe(H). For both types of matrix, ρ was found to vary significantly with field strength and temperature. We attribute this variation to proximity effect, the existence of which in these strands has been previously verified by means of very low ramp rate M-H measurements. The temperature- and field dependences of ρ in the Cu- and CuMn-matrix strands are quite different in character, in keeping with the strands’ differences in PE strength. With the aid of longitudinal resistivity data various contributions to the resistivity, such as size effect and current-path effect, have been identified.

Keywords

Magnetic Field Strength Ramp Rate Proximity Effect Bulk Resistivity Longitudinal Resistivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • M. D. Sumption
    • 1
  • E. W. Collings
    • 1
  1. 1.Battelle Memorial InstituteColumbusUSA

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