Critical Currents of Superconducting Nb 25 at.% Zr in High Magnetic Fields

Journal Article · Sun Jul 01 00:00:00 EDT 1962 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1728935· OSTI ID:4781737

Aron, Paul R.; Hitchcock, Harley C.

Measurements of critical current as a function of applied magnetic field were made on wire samples of Nb 25% at. Zr alloy at 4.22°K and 2.24°K. Curves are plotted for the cases for which the applied magnetic field is parallel to or perpendicular to the current direction. At 4.22°K, H_c (I → 0) for H perpendicular to I is found to be 70 kG, while for H parallel to I, it is found to be 82 kG. Reduction of the temperature to 2.24°K results in an increase of 13 kG in both cases. For H perpendicular to I, current densities of 4.4×10⁴ A/cm² are observed at 60 kG and 4.22°K, and at 73 kG and 2.24°K. The effective demagnetization factor of the current carrying elements is 0.6 π. Finally, all measurements were made in a dc magnetic field with quasidirect currents by observation of the first resistive voltage to appear across the sample.

• Research Organization: Univ. of California, Berkeley
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-000553
• OSTI ID: 4781737
• Journal Information: Journal of Applied Physics, Vol. 33, Issue 7; Other Information: Orig. Receipt Date: 31-DEC-63; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
CRITICAL CURRENT
CURRENTS
LOW TEMPERATURE
MAGNETIC FIELDS
MEASURED VALUES
NIOBIUM ALLOYS
SUPERCONDUCTIVITY
WIRES
ZIRCONIUM ALLOYS