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| Naji, M. |
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Abrahamsen, Asger Bech
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Topics
Publications (19/19 displayed)
- 2023Corrosion surface morphology-based methodology for fatigue assessment of offshore welded structurescitations
- 2018Two level undercut-profile substrate-based filamentary coated conductors produced using metal organic chemical vapor depositioncitations
- 2018Optimal design of galvanic corrosion protection systems for offshore wind turbine support structurescitations
- 2017Potential of Partially Superconducting Generators for Large Direct-Drive Wind Turbinescitations
- 2017The Effect of Nano-TiC Addition on Sintered Nd-Fe-B Permanent Magnetscitations
- 2017The Effect of Nano-TiC Addition on Sintered Nd-Fe-B Permanent Magnetscitations
- 2017Topology Comparison of Superconducting Generators for 10-MW Direct-Drive Wind Turbines: Cost of Energy Basedcitations
- 2015Potential of MgB 2 superconductors in direct drive generators for wind turbines
- 2015Effects of an electromagnetic shield and armature teeth on the short-circuit performance of a direct drive superconducting generator for 10 MW wind turbinescitations
- 2015Potential of MgB2 superconductors in direct drive generators for wind turbines
- 2012Large superconducting wind turbine generatorscitations
- 2012Critical current density measurement of thin films by AC susceptibility based on the penetration parameter hcitations
- 2010Influence of the initial Bi2223 phase content on microstructure development in Bi2223/Ag tapescitations
- 2010Anisotropy of the critical current in MgB2 tapes made of high energy milled precursor powdercitations
- 2009Modeling flux pinning in thin undoped and BazRo3-doped YBCO filmscitations
- 2009Design study of 10 kW superconducting generator for wind turbine applicationscitations
- 2009Design study of 10 kW superconducting generator for wind turbine applicationscitations
- 2003Possible magnetism in vortex cores of superconducting TmNi2B2C studied by small angle neutron scattering
- 2003Possible magnetism in vortex cores of superconducting TmNi 2 B 2 C studied by small angle neutron scattering
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article
Critical current density measurement of thin films by AC susceptibility based on the penetration parameter h
Abstract
We have numerically proved that the dependence of AC susceptibility χ of a E(J) power law superconducting thin disc on many parameters can be reduced to one penetration parameter h, with E the electric field and J the current density. Based on this result, we propose a way of measuring the critical current density Jc of superconducting thin films by AC susceptibility. Compared with the normally used method based on the peak of the imaginary part, our method uses a much larger range of the AC susceptibility curve, thus allowing determination of the temperature (T) dependence of Jc from a normally applied χ(T) measurement. A fitting equation Jc=1.9Ha∣χ′∣0.69/d, −0.4