XPS studies of several high temperature superconductors: Y-Ba-Cu-O and La-Ba-Cu-O systems |
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| Institution: | 1. Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece;2. Chemical Process & Energy Resources Institute, CE.R.T.H., Thessaloniki, Greece;3. University of Oslo, Department of Chemistry, Centre for Materials Science and Nanotechnology, Oslo, Norway;4. Department of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Gdansk, Poland;5. School of Production Engineering and Management, Technical University of Crete, Chania, Greece;6. Department of Environmental Engineering, University of Western Macedonia, Kozani, Greece |
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| Abstract: | Copper 2P core level X-ray photoelectron spectra on several high Tc superconductors La1.85Ba0.15CuO4, Y1.2Ba0.8CuO4−δ and Y0.4B0.6CuO4−δ oxides have been measured. The results indicate the coexistence of Cu2+ and Cu3+ in these compounds. |
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