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Field history effect of the flux gradient in superconducting niobium

โœ Scribed by O. F. Lima; G. Zerweck; A. S. Brito

Publisher
Springer US
Year
1978
Tongue
English
Weight
307 KB
Volume
32
Category
Article
ISSN
0022-2291

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โœฆ Synopsis

The flux density gradient in a plastically deformed niobium single crystal was measured. The profiles in increasing and decreasing field are not symmetric, and depend on the history of the magnetic field. This effect was observed up to 0.9Hc2, although it was more pronounced at lower fields. These results, as well as an observed asymmetry of minor hysteresis loops, cannot be understood by the critical state model. We suggest that they are related to the creation of dislocations in the flux line lattice.

๐Ÿ“œ SIMILAR VOLUMES

High critical flux density gradients nea
High critical flux density gradients near the surface of superconducting niobium
โœ A. S. Brito; G. Zerweck; O. F. Lima ๐Ÿ“‚ Article ๐Ÿ“… 1979 ๐Ÿ› Springer US ๐ŸŒ English โš– 641 KB

The profiles of the magnetic induction near the surface of cylindrical niobium samples were measured by the method of differential susceptibility in minor hysteresis loops. The flux density gradient near the surface generally is considerably higher than in the bulk. This may be interpreted in terms