Effects of Sm1+xBa2-xCu3Oy Films with Non-Stoichiometric Composition Fabricated by Combinatorial Pulsed Laser Deposition method on the Superconducting Properties

Abstract

Abstract Sm1+x Ba2-x Cu3O y , (Sm-rich) had higher critical current density (J c) in magnetic fields and higher irreversible fields than stoichiometric SmBa2Cu3O y (SmBCO) thin films. In this study, to clarify the features of artificial pinning centers (APCs) doped Sm-rich films, we prepared BaHfO3 (BHO)-doped Sm1+x Ba2-x Cu3O y films with x = 0.00 ∼ 0.20 using combinatorial pulsed laser deposition (C-PLD) method on a metallic substrate and we evaluate surface morphrogies, crystal orientations and superconducting properties of the films. As a result, when x increased, the terrace width also increased. From the measurement of J c in magnetic fields, the BHO-doped Sm-rich films showed J c plateaus around 1 ∼ 3 T. From the angulaer dependence of J c, the BHO-doped Sm-rich films showed J c peak where B is parallel to c-axis. From several measurements, we discuss effects of Sm1+x Ba2-x Cu3O y films with and without BHO on the superconducting properties.