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The cooperative effect of electronic structures in high Tc superconductor YBa2Cu3O7−δ system

✍ Scribed by Zhang Yuheng; Ji Mingrong; Chen Lin

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
308 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

Different

temperature quenched YBa,Cu80'-5 samples have been investigated by means of X-ray photoelectron spectroscopy(XPS). The binding energy shift and the shape variation of Y3d and Ba3ds! show some correlation with superconductivity of the samples. It is suggested that the superconductivity of Y-based oxides may come from the cooperative effect of the components other than from the CuO! layers or Cu-O chains only.

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Quantum dimensional effect in powders of
Quantum dimensional effect in powders of the high-Tc superconductor YBa2Cu3O7-δ
✍ V. Fleisher; E. Lähderanta; R. Laiho; Yu.P. Stepanov 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 338 KB

Low-field magnetization has been investigated in powders of YBa2Cu3OT\_~ using ~amples with different maximal characteristic particle sizes dm~ of between 2.4 and 7.4 ~m. Measurements of the thermoremanent magnetization reveal the existence of a threshold field H~ corresponding to trapping of a sing