𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Characterization and superconductivity of YBa2Cu4O8 and Y2Ba4Cu7O14+x and their intergrowths

✍ Scribed by T. Graf; G. Triscone; A. Junod; J. Muller

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

No coin nor oath required. For personal study only.

✦ Synopsis

Pure single phase Y2Ba4Cu70l4+x ("247") and two phase compositions containing either "123" or "124" inclusions were prepared under 85 bar oxygen pressure at lOOOβ€’C. The samples were characterized by X-ray diffraction, microprobe analysis and microstructural examination. The measurements of the a.c. susceptibility, the field cooling magnetization and the resistivity indicate that T c of "247" is actually higher than that of "124" but suggest a more pronounced influence of oxygen defects in "247" under the present conditions of synthesis.

πŸ“œ SIMILAR VOLUMES

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 πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 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

Comparison of oxygen ordering and charge
Comparison of oxygen ordering and charge transfer in YBa2Cu3O6+x and Y2Ba4Cu7O14+x compounds
✍ E.E. Tornau; P.J. Kundrotas; S. Lapinskas; A. Rosengren πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 263 KB

Various factors (orthorhombic strain, Cu-deficiency and Al-doping) which might be responsible for the disappearance of the plateau in the T~(x) dependence in YBa2CusO6+~ and YuBa4CuΒ’O14+~ are studied by Monte Carlo calculation of holes amount dependence on z in a framework of a generalized ASYNNNI m