Enhancement of critical current density in $BaCeO_3$ doped $YBa_2Cu_3O_{7-\delta}$ thin Films deposited by TFA-MOD process

The effect of doping on the critical current density of YBCO film by TFA-MOD method was studied. doping was made by two method; one is direct addition of nano-sized powder prepared by citrate process followed by grinding with planetary ball mill for 10 hours. Another is addition of Ba-Ce precursor solution prepared with Ba-acetate and Ce acetate dissolved in TFA to the YBCO-TFA precursor solution. The film was made by standard dip coating and heat treatment process with conversion temperature of in 1000 ppm oxygen containing moisturized Ar gas atmosphere. The direct addition of powder resulted in YBCO film with good epitaxial growth and no evidence of second phase formation. The addition through precursor solution resulted in the increase of critical current density upto 30 at% doping and uniform dispersion of fine inclusion was confirmed by SEM-EDX.