Effect of pressure on the superconductivity in high-T{sub c} mercury ceramics
Journal Article
·
· Journal of Experimental and Theoretical Physics
OSTI ID:28462
- L.F. Vereshchagin Institute of High-Pressure Physics, Troitsk, Moscow (Russian Federation)
The pressure-dependent magnetic properties of a new class of high-T{sub c} superconducting cuprates with the general formula HgBa{sub 2}Ca{sub n{minus}1}Cu{sub n}O{sub 2n+2+x} (Hg-12(n{minus}1)n) were investigated. The pressure derivatives of the superconducting transition temperature and the second critical field were measured in the hydrostatic-pressure range (up to 22 kbar). For the Hg-1212 and Hg-1223 phases the derivatives are dT{sub c}/dP=0.30-0.35 K/kbar; for the Hg-1201 phase the derivative is much smaller: dT{sub c}dP=0.07 K/kbar. The results obtained are discussed in connection with the impossibility of explaining the effect of pressure on superconductivity only by a change in the carrier density in the Cu-O plane. For the Hg-1201 phase the pressure effect is explained by either the possibility of a pressure-induced rearrangement of the oxygen subsystem Y-123, Tl-2223, and Bi-2212. The results indicate strong magnetic-flux creep and the existence of regions with different pinning potentials. 14 refs., 3 figs., 1 tab.
- OSTI ID:
- 28462
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 78; ISSN 1063-7761; ISSN JXTPAS
- Country of Publication:
- United States
- Language:
- English
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