Enhanced critical current under a magnetic field in Sm_1+xB _2-xCu₃O_y thick films prepared using low-temperature growth technique

REBa₂Cu₃O_y films require a high critical current (I_c) under a high magnetic field at 77 K when using power applications. In this study, we fabricated Sm_1.04Ba _1.96Cu₃O_y (SmBCO) thick films prepared using a low-temperature growth (LTG) technique in order to improve crystal quality and enhance flux pinning. The LTG multilayer thick film using a (SmBCO/Sm-rich layer) × N (N = 1,2,...) multilayer system showed a high crystal quality. Additionally, the LTG multilayer thick film showed not only a high density of dislocations but also low-T_c particles within a high-T_c matrix. Therefore, the LTG multilayer film showed an I_c of 20.6 A/cm-width (77 K, B // c, B = 5 T) and had a thickness of only 1.35 μm and a low anisotropy I_c for the high-magnetic-field direction. These results support to the developing possibility of power devices using a solenoid-type coil.