Superconducting-magnetic heterostructures as a new method of decreasing transport AC losses in multifilamentary and coated superconductors

摘要: Abstract Numerical modelling was used to investigate the effect of decoupling filaments in superconducting tapes by magnetic screening on transport AC losses. Both multifilamentary Bi-2223 and YBCO coated conductors were modelled. Different configurations multifilament geometry with covered layers a soft iron non-linear B ( H ) characteristic considered. Calculations contribution individual loss conducted for selected configurations. A comparison calculated results perfect inter-filamentary provided. The obtained level modelled 55 “coupled” agrees at critical current value experimental achieved 55-filamentary tape. Since appear be favourable solution low losses applications, factors which affect percolative nature flow conductors, such as grain size sample dimensions, have also been studied order predict density variations.