Effect of Substrate and Buffer Layer Materials on Properties of Thin $\hbox{YBa}_{2}\hbox{Cu}_{3}\hbox{O}_{7 - {\rm x}}$ Films

Structural, Atomic and Electrostatic Force Microscopy Analyses on YBCO/PBCO/LCMO Superlattices

“…According to Masilamani et al 13 , in their search for buffer layer materials for YBCO thin film devices having smooth top surfaces, the PBCO layer was the structurally and chemically best compatible material for YBCO among the tested materials. This layer, having approximated 30nm thickness, has promoted significant improvement of the surface morphology of the film, although it was also responsible for a slight increase on the critical temperature transition width due to a small inhomogeneity in the YBCO thin film.…”

Strain-induced local structural change and its effect on the superconducting properties of GdBa2Cu3O7-x /La0.7Sr0.3MnO3 heterostructure

“…For REBa 2 Cu 3 O 7-x (REBCO, RE: rare-earth element) superconducting films, various buffer layers have been introduced [5][6][7][8][9][10][11][12]. Overall there are two categories, i.e.…”

“…nonmagnetic and magnetic buffer layers. For non-magnetic buffer layers including metal oxides such as BaZrO 3 , BaTiO 3 , and CeO 2 , most of the work has focused on the epitaxial compatibility and the chemical stability between the REBCO and buffer layers [5][6][7][8]. However, most of the approaches showed a T c decrease compared to the pristine sample due to the diffusion of oxygen and metal atoms into the superconducting layer.…”

“…It is generally known that the ground state of REBCO indicates the O 2p orbital hybridizes with the Cu 3p orbital forming antibonding Cu-O orbitals, resulting in a mixed contribution of Cu (3d 9 ) and Cu (3d 8 ). The tight binding theory predicts that tilting/buckling of the Cu-O bond in the CuO 2 plane can affect the strength of hybridization between the Cu 3d and the O 2p orbitals, and it tunes the superconductivity through the creation of holes at the Cu or the O sites in the CuO 2 plane [23,[27][28][29][30].…”