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Sample size effect on the Meissner fraction in YBa2Cu3O7−x single crystals

✍ Scribed by M.V. Kartsovnik; G.Yu. Logvenov; K.Ya. Soifer

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
287 KB
Volume
30
Category
Article
ISSN
0011-2275

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✦ Synopsis

The effect of sample size on magnetic flux expulsion in field cooling experiments has been studied on YBa2Cu307_ X single crystals sliced parallel to the basal plane in several steps. A simple model is proposed which describes the process of magnetic flux expulsion out of hard superconductors. Qualitative agreement of the obtained results with the model is demonstrated.

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The Effect of Ca Doping on the Structure
The Effect of Ca Doping on the Structures of YBa2Cu4O8 and Y2Ba4Cu7O14+x Single Crystals
✍ H. Schwer; E. Kaldis; J. Karpinski; C. Rossel 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 455 KB

The transition temperature of \(\mathrm{YBa}_{2} \mathrm{Cu}_{4} \mathrm{O}_{8}(124)\) is increased by about \(10 \mathrm{~K}\) by doping with calcium, whereas Ca substitution in \(\mathrm{Y}_{2} \mathrm{Ba}_{4} \mathrm{Cu}_{7} \mathrm{O}_{14+x}\) (247) has no effect on \(T_{\mathrm{c}}\). X-ray str