Abstract
PBCO films have been successfully fabricated at different temperatures. X-ray diffraction results show that the orientation of PBCO films varies with decreasing deposition temperature. The optimal deposition condition for a-axis oriented PBCO films is 15 Pa oxygen pressure and 700°C. Raman scattering measurements indicate that the 514 cm −1 of A g phonon mode can be used as a criterion for determining whether the film is a-axis-oriented or not, e.g., the intensity of 514 cm −1 mode is the strongest for c-axis-oriented film but almost disappears for a-oriented film. High-resolution transmission electron microscopy confirms that our a-axis-oriented film has a good structural quality.
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