Title :
MOD-Processed SmBCO Films on LaAlO3 (100) Substrates
Author :
Shin, Geo-Myung ; Kim, Duck-Jin ; Song, Kyu-Jeong ; Park, Chan ; Moon, Seung-Hyun ; Yoo, Sang-Im
Author_Institution :
Seoul Nat. Univ., Seoul
fDate :
6/1/2007 12:00:00 AM
Abstract :
SmBa2Cu3O7-delta(SmBCO) thin films were successfully prepared on the LaAlO3(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 LaAlO3(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 TC,zero value of 90.2 K and JC value of 0.8 MA/cm2 at 77 K, respectively. Relatively lower JC values in SmBCO films compared with MOD-processed YBCO films are attributed to the existence of a-axis oriented grains.
Keywords :
barium compounds; calcination; critical current density (superconductivity); lanthanum compounds; samarium compounds; spin coating; superconducting thin films; LaAlO3; MOD-processed SmBCO films; SmBCO powder; SmBCO thin films; SmBa2Cu3O7; TFA-MOD method; calcination; critical current density; extremely reduced oxygen atmosphere; precursor solution; single crystalline substrates; spin-coating; temperature 77 K; temperature 90.2 K; time 2 h; trifluoroacetic acid solution; Atmosphere; High temperature superconductors; Magnetic films; Materials science and technology; Powders; Substrates; Superconducting films; Superconductivity; X-ray scattering; Yttrium barium copper oxide; Critical current density; SmBCO; TFA-MOD; thin film;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.899384
