원문정보
초록
영어
We have investigated the effect of Y2O3 nanoparticles on the pinning properties of Y2O3-doped GdBa2Cu3O7-δ (GdBCO) films. Both undoped and Y2O3-doped GdBCO films were grown on CeO2-buffered MgO (100) single crystal substrates by pulsed laser deposition (PLD) using KrF (λ=248 nm) laser. The Y2O3 doping contents were controlled up to ~ 2.5 area% by varying the internal angles of Y2O3 sectors put on the top surface of GdBCO target. Compared with the Gd2O3-doped GdBCO films previously reported by our group [1], the Y2O3-doped GdBCO films exhibited less severe critical temperature (Tc) drop and thus slightly enhanced critical current densities (Jc) and pinning force densities (Fp) 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 Jc and Fp values of all Y2O3-doped GdBCO films exhibited higher than those of undoped GdBCO film, suggesting that Y2O3 inclusions might act as effective pinning centers.
목차
1. INTRODUCTION
2. EXPERIMENTAL
3. RESULTS AND DISCUSSION
4. SUMMARY
ACKNOWLEDGMENT
REFERENCES