Phase segregation of (Hg,Re)-1223 superconductor
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2006
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INTERNATIONAL CONFERENCE ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY - HIGH TEMPERATURE SUPERCONDUCTORS 2006
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Synchrotron Anomalous X-Ray Scattering near Re (rhenium) edge reveals that the short range structue of
Hg0.8Re0.2Ba2Ca2Cu3O8+d compound is not form part of (2a × 2b × 1c) super cell. Moreover, even for a high quality
sample (highest Tc and single phase diamagnetic transition), the Synchrotron X-Ray diffraction pattern analyzed
by Reitveld refinement confirms there exist two superconductor phases present in the sample produced with optimal
oxygen doping content (Hg-1223 and Hg,Re-1223). Extended X-Ray Absorption Fine Structure measurements of the
rhenium oxide (VI) sample under external hydrostatic pressure (up to 1.9 GPa)reveal that the ReO6 octahedron
spectrum obtained at 1.76 GPa is similar to the ReO6 octahedron inside the (Hg,Re)-1223 structure at ambient
pressure. The ReO6 distorted octahedron inside Hg,Re-1223, and the non-existence of (2a × 2b × 1c) super cell can
justify the scenario where charge inhomogeneities distribution are present in the outer CuO2 layers.
Como referenciar
PASSOS, C.A.C.; PASSAMAI JUNIOR, J.L.; ORLANDO, M.T.D.; CORREA, H.P.S.; ROSSI, J.L.; GARCIA, F.; TAMURA, E.; FERREIRA, F.F.; MELO, F.C.L. de. Phase segregation of (Hg,Re)-1223 superconductor. In: INTERNATIONAL CONFERENCE ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY - HIGH TEMPERATURE SUPERCONDUCTORS 2006, July 9-14, 2006, Dresden, Germany. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/13740. Acesso em: 19 Feb 2025.
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