Dependence of transport current losses in coated conductors on magnetic property of substrate

Influence of ferromagnetism of the substrates on transport current losses in HoBaCuO-123 tape-shaped coated conductors with ferromagnetic Ni-alloy substrates was investigated by measuring the losses as a function of an external DC magnetic field. The losses were measured by electric and calorimetric methods simultaneously to prove the validity of the measured data. The experimental results showed significant influence of ferromagnetism of the substrates, when the substrates were not magnetically saturated by an external DC magnetic field. On the other hand, when the substrates were saturated, the loss characteristics were less influenced.