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Structure of YBa2Cu3078 and Bii 7Pbo 3Sr2CaCu2Ox
Investigations in Bii 7Pbo 3 Sr2CaCu20x samples
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a-axis a-particles amplitude annealing atomic columns atomic layers atoms Bravais lattice c-axis cations CO3 groups composition compounds corresponding critical current density crystal structure Cu-O cuprate defects defocus diffraction patterns direction dislocations electron beam electron diffraction electron microscope energy experimental Figure flux pinning FWHM grain boundaries growth high Tc superconducting high temperature superconductors high-resolution images High-resolution structure image HREM image HRTEM HTSC indicated interface intergrowth lamellae lattice Lett magnetic material micrograph microstructure minimum yield modulation n=2 phase neutron diffraction obtained oxycarbonate oxygen oxygen atoms oxygen vacancies parameters perovskite Phys Physica planes regions resolution rows S. J. Pennycook sample scattering schematic selected area diffraction shown in Fig shows simulated images single crystals spectra stacking faults structure model studies substrate superconducting transition superstructure surface structures technique thin films transmission electron transmission electron microscopic twinning unit cell vector YBCO Z-contrast image Zandbergen