INDUCED SUPERCONDUCTIVITY IN TETRAGONAL YBA2CU3O6 BY INCORPORATION OF CA
| Autor: | Ru-Shi Liu, W.Y. Liang, Wuzong Zhou, J. R. Cooper, Peter P. Edwards, J. W. Loram, W. Lo, L.S. Chen |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Analytical chemistry Mineralogy General Chemistry Condensed Matter Physics Heat capacity Crystal Tetragonal crystal system chemistry Electron diffraction Electrical resistivity and conductivity X-ray crystallography Materials Chemistry Selected area diffraction Inorganic compound |
| DOI: | 10.1016/0038-1098(90)90115-r |
| Popis: | The effects of the substitution of Y3+ by Ca2+ in semiconducting, tetragonal YBa2Cu3O6+δ (δ=0.10+0.01) were studied by electrical resistivity, X-ray diffraction (XRD), energy dispersive X-ray spectrometry (EDS), selected area electron diffraction (SAED) and heat capacity measurements. The maximum Tc (20K) was found for 25–30% Ca incorporation in the YBa2Cu3O6.10 compound; we find that this is also the maximum solubility limit for Ca doping. SAED patterns are consistent with disorder between the Ca and Y ions along the crystal c axis. The specific heat anomaly around 23K was observed with Δ(Tc)/Tc ∼ 2 mJ/g.at K2 and γ(0) ∼ 1.3 mJ/g.at K2. |
| Databáze: | OpenAIRE |
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