MOD-Processed SmBCO Films on ${\rm LaAlO}_{3}$ (100) Substrates

SmBa
₂
Cu
₃
O
_7-delta
(SmBCO) thin films were successfully prepared on the LaAlO
₃
(100) substrate by the TFA-MOD method in an extremely reduced oxygen atmosphere. The precursor solution was prepared dissolving SmBCO powder into the trifluoroacetic acid solution. The precursor solution was spin-coated on the LaAlO
₃
(100) single crystalline substrates, calcined at the temperature up to 400degC, and fired at various high temperatures for 2 h in reduced oxygen atmospheres. Optimally processed SmBCO thin film exhibited T
_C,zero
value of 90.2 K and J
_C
value of 0.8 MA/cm
²
at 77 K, respectively. Relatively lower J
_C
values in SmBCO films compared with MOD-processed YBCO films are attributed to the existence of a-axis oriented grains.