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XPS STUDY OF SUPERCONDUCTOR Ba_2YCu_3O_(7-δ) BY VACUUM ANNEALING
<正> Discovery of the superconductivity in Ba-Y-Cu-O system above liquid nitrogen transition temperature has stimulated the extensive studies. The properties of superconducting material depend on the temperature and atmosphere during its sinter. In fact, the oxygen content in sample can be affected seriously by sintering and annealing procedure. The results of X-ray and neutron diffraction analysis indicate that the oxygen vacancy plays an important role in superconductor Ba-Y-Cu-O with
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Chinese Science Bulletin
1989年04期

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