Effects of vicinal substrates on the orientation of Bi2Sr2CaCu2O8+x thin films when the metal-organic decomposition method is used

Abstract

Abstract We have prepared (010) (or (100)) oriented Bi2Sr2CaCu2O8+x (Bi2212) thin films by metal-organic decomposition (MOD) method which is one kind of solution method. The flat and vicinal (100) substrate (the miscut angle φ = 5° toward the direction [001]) of NdGaO3 (NGO) was used. When using vicinal substrates, the Bi2212 (020) (or (200)) peak appeared clearly in the XRD patterns. From the SEM image, it was found that elongated plate-like crystal grains of Bi2212 were grown. From the viewpoint of lattice matching, this elongated crystal grain is considered to be (010) (or (100)) oriented Bi2212 crystal grains.