The effect of neutron irradiation damage on the magnetic behavior of superconducting niobium in stationary fields

Klein, Claude; Kes, P.H.; Beelen, H. van; Klerk, D. de

doi:10.1007/bf00655866

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…Type II superconductors with negligible bulk pinning may also present hysteresis effects, due to Bean–Livingston surface barriers [ 2 ] or due to geometrical edge barriers (specimen-shape dependent) [ 3 ]. Both types have been observed in low- and high-temperature superconductors (LTS and HTS, respectively) [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. The former type of barriers is generally observed in clean single crystals, whereas the latter is more pronounced for thin films of constant thickness in perpendicular magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures

et al. 2020

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Irradiation with ultra-short (femtosecond) laser beams enables the generation of sub-wavelength laser-induced periodic surface structures (LIPSS) over large areas with controlled spatial periodicity, orientation, and depths affecting only a material layer on the sub-micrometer scale. This study reports on how fs-laser irradiation of commercially available Nb foil samples affects their superconducting behavior. DC magnetization and AC susceptibility measurements at cryogenic temperatures and with magnetic fields of different amplitude and orientation are thus analyzed and reported. This study pays special attention to the surface superconducting layer that persists above the upper critical magnetic field strength Hc2, and disappears at a higher nucleation field strength Hc3. Characteristic changes were distinguished between the surface properties of the laser-irradiated samples, as compared to the corresponding reference samples (non-irradiated). Clear correlations have been observed between the surface nanostructures and the nucleation field Hc3, which depends on the relative orientation of the magnetic field and the surface patterns developed by the laser irradiation.

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