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http://dx.doi.org/10.9714/psac.2011.13.4.022

High-$I_c$ single-coat YBCO films prepared by the MOD process  

Lee, J.W. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University)
Shin, G.M. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University)
Yoo, S.I. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University)
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Progress in Superconductivity and Cryogenics / v.13, no.4, 2011 , pp. 22-25 More about this Journal
Abstract
A single-coat $YBa_2Cu_3O_{7-{\delta}}$ (YBCO) film of high critical currents ($I_c$) could be successfully fabricated by optimizing the viscosity of the coating solution in the metal-organic deposition (MOD) process. From a Ba-deficient coating solution (Y: Ba: Cu = 1: 1.5: 3) having the viscosity of 212 $mPa{\cdot}sec$, 0.9 ${\mu}m$-thick single coat YBCO film with the $I_c$ value of 289 A/cm-width ($J_c$ = 3.2 MA/$cm^2$) at 77 K was achievable on the $SrTiO_3$ (STO) substrate, which was superior to that of our previous report for 0.8 ${\mu}m$-thick single coat YBCO film from a stoichiometric coating solution (Y: Ba: Cu = 1: 2: 3) on the $LaAlO_3$ (LAO) substrate. This result might be attributed to denser and more homogeneous microstrcuture in the case of the YBCO film from the Ba-deficient coating solution.
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