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http://dx.doi.org/10.9714/psac.2018.20.4.041

The superconductivity and pinning properties of Y2O3-doped GdBa2Cu3O7-δ films prepared by pulsed laser deposition  

Oh, Won-Jae (Department of Materials Science & Engineering, and Research Institute of Advanced materials (RIAM), Seoul National University)
Park, Insung (Department of Materials Science & Engineering, and Research Institute of Advanced materials (RIAM), Seoul National University)
Yoo, Sang-Im (Department of Materials Science & Engineering, and Research Institute of Advanced materials (RIAM), Seoul National University)
Publication Information
Progress in Superconductivity and Cryogenics / v.20, no.4, 2018 , pp. 41-45 More about this Journal
Abstract
We have investigated the effect of $Y_2O_3$ nanoparticles on the pinning properties of $Y_2O_3$-doped $GdBa_2Cu_3O_{7-{\delta}}$ (GdBCO) films. Both undoped and $Y_2O_3$-doped GdBCO films were grown on $CeO_2$-buffered MgO (100) single crystal substrates by pulsed laser deposition (PLD) using KrF (${\lambda}=248nm$) laser. The $Y_2O_3$ doping contents were controlled up to ~ 2.5 area% by varying the internal angles of $Y_2O_3$ sectors put on the top surface of GdBCO target. Compared with the $Gd_2O_3$-doped GdBCO films previously reported by our group [1], the $Y_2O_3$-doped GdBCO films exhibited less severe critical temperature ($T_c$) drop and thus slightly enhanced critical current densities ($J_c$) and pinning force densities ($F_p$) at 65 K for the applied field parallel to the c-axis of the GdBCO matrix (B//c) with increasing the doping content. Below 40 K, the in-field $J_c$ and $F_p$ values of all $Y_2O_3$-doped GdBCO films exhibited higher than those of undoped GdBCO film, suggesting that $Y_2O_3$ inclusions might act as effective pinning centers.
Keywords
flux pinning; GdBCO; Pulsed Laser Deposition(PLD);
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