Effect of Sr substitution on superconductivity in Hg2(Ba1-ySry)2YCu2O8-d (part 1): a neutron powder diffraction study

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dc.creatorToulemonde, P.
dc.creatorOdier, P.
dc.creatorBordet, P.
dc.creatorFloch, S. Le
dc.creatorSuard, E.
dc.date2002-07-16
dc.date2004-05-07
dc.date.accessioned2026-07-07T02:46:18Z
dc.date.available2026-07-07T02:46:18Z
dc.descriptionThe effect of Sr chemical pressure on superconductivity was investigated in Hg2(Ba1-ySry)2YCu2O8-d. The samples were synthesized at high pressure-high temperature from y = 0.0 to full substitution, y = 1.0. These Sr-substituted compounds are superconducting, without Ca doping on the Y site, and show an increasing Tc with Sr, reaching 42 K for y = 1.0. A detailed neutron powder diffraction study compares the structural changes induced by this chemical Sr/Ba substitution and the mechanical pressure effects in the Hg-2212 system. It shows the strong decrease of the three Ba/Sr-O distances and consequently the shrinkage of Cu-O1(in-plane) and Cu-O2(apical) bonds. These structural changes, by affecting the charge transfer which occurs between the charge reservoir and the superconducting block, are responsible of the Tc enhancement with Sr content.
dc.description20 pages, 12 figures, accepted for publication in Journal of Physics:Condensed Matter
dc.identifierhttps://arxiv.org/abs/cond-mat/0207395
dc.identifierhttp://arxiv.org/abs/cond-mat/0207395
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19617
dc.subjectSuperconductivity
dc.titleEffect of Sr substitution on superconductivity in Hg2(Ba1-ySry)2YCu2O8-d (part 1): a neutron powder diffraction study
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