Abstract
Artificial pinning centers (APC) for trifluoroacetates-metal organic deposition (TFA-MOD) Y1-xSmxBa2Cu3Oy (YSmBCO) coated conductors were introduced to enhance Jc under the magnetic fields and improve the magnetic field angular dependence of Jc. The coated conductors showed high self-fields Jc values (Jcs.f.) of 3.8 MA/cm2 and a Jc minimum value of 0.53 MA/cm2 at 77 K and 1 T. Moreover, the coated conductors have isotropic Jc-B-θ properties with the ratio (Jc,min/Jc,max) of 0.91 (77K, B=1 T). From the results of microstructural observation, BaZrO3 (BZO) nanoparticles were uniformly dispersed in the films by introduction of Zr-salt into the YSmBCO metallic organic solution. The nanoparticles were dispersed uniformly not only along the lateral direction (B//ab) but also along the normal direction to the tape (B//c). It is believed that the uniform dispersion of BZO nanoparticles in TFA-MOD REBCO coated conductors may act as flux pinning centers to enhance the Jc independent from the angle of the applied magnetic fields.
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