The effect of the YBCO–PST composite composition on the superconducting carrier concentration determined by microwave studies under high pressure
| Autor: | M. Krupski, A Kaczmarek, B. Hilczer, Bartłomiej Andrzejewski, S Przybył, J. Marfaing, C. Caranoni, J. Stankowski |
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| Rok vydání: | 1999 |
| Předmět: |
Superconductivity
Materials science Absorption spectroscopy Transition temperature Hydrostatic pressure Composite number Analytical chemistry Energy Engineering and Power Technology Sintering Condensed Matter Physics Electronic Optical and Magnetic Materials Phase (matter) Electrical and Electronic Engineering Absorption (chemistry) |
| Zdroj: | Physica C: Superconductivity. 320:120-126 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(99)00299-3 |
| Popis: | The effect of hydrostatic pressure ( p T c in YBa 2 Cu 3 O 7− δ –Pb(Sc 0.5 Ta 0.5 )O 3 (YBCO–PST) composite is measured by the method of magnetically modulated microwave absorption (MMMA). The T c dependence on the PST fraction in weight x (0, 0.25, 0.5 and 0.75) is approximated by an inverted parabola function whereas the influence of pressure on T c is represented by the equation: d T c /d p =0.61(2)−1.72(6) x . The result may be explained assuming that PST phase in YBCO–PST composite influences the superconducting carrier concentration similar to the chemical substitution in YBa 2 Cu 3 O 7 [J.J. Neumeier, H.A. Zimmermann, Phys. Rev. B 47 (1993) 8385]. It is suggested that ions from PST diffuse to YBCO cell during the sintering of the composite. |
| Databáze: | OpenAIRE |
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