Longitudinal Magnetic Field Effects on (Y,Gd)Ba2Cu3O7−δ Coated Conductor With BaHfO3 Nanoparticles Fabricated by UTOC-MOD Method

To clarify the effects of longitudinal magnetic field (LMF) on Y
_0.77
Gd
_0.23
Ba
₂
Cu
₃
O
_7-δ
coated conductors fabricated by the trifluoroacetic-acid based metal organic decomposition method with the ultra-thin-once-coating process (UTOC-MOD (Y,Gd)BCO-CCs), and to understand the contributions of BaHfO
₃
nanoparticles (BHO-NPs) to this, we investigated the critical current density J
_c
under a wide range of temperature and magnetic field conditions. We found that J
_c
in the LMF configuration increased compared to those in the in-plane transverse magnetic field configuration under whole conditions in samples both with (w/) and without (w/o) BHO-NPs. J
_c
enhancement due to the LMF configuration was remarkable in the w/ BHO-NPs sample at higher temperatures, indicating that introduction of BHO-NPs to UTOC-MOD (Y,Gd)BCO-CC would be useful for LMF DC cable applications.