Microstructures of BaSnO 3 -doped ErBa 2 Cu 3 O 7_δ films were studied by transmission electron microscopy. BaSnO 3 -doped ErBa 2 Cu 3 O 7-δ films were grown by a pulsed laser deposition method. In the cross-sectional transmission electron microscopy observation, the presence of nanorods with 10nm average diameter was confirmed from bright-field images, and these nanorods in turn contained tin (Sn), as confirmed from the energy-dispersive X-ray spectroscopy spectra. The crystal structure of the nanorod was determined to be cubic perovskite from its selected area electron diffraction pattern. Using the selected area electron diffraction patterns, the lattice constant of the nanorods in the ErBa 2 Cu 3 O 7-δ film was measured to be 0.414 nm. This was in good agreement with the lattice constant of BaSnO 3 , 0.412nm. Furthermore, parallel Moiré fringes were observed in the bright-field images, and the relationships between the lattice planes and Moiré fringes were investigated. It was thus confirmed that BaSnO 3 was dispersed in the ErBa 2 Cu 3 O 7-δ as nanorods.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)