Volume 72, Number 3, November 2005
|Page(s)||458 - 464|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||30 September 2005|
High-pressure effects in fluorinated
CRTBT, CNRS - BP166, 38042 Grenoble Cedex 09, France
2 Laboratorio de Bajas Temperaturas, Departamento de Física, FCEyN Universidad de Buenos Aires, Ciudad Universitaria (C1428EHA) Buenos Aires, Argentina
3 Department of Chemistry, Moscow State University - Moscow 119992, Russia
Corresponding author: email@example.com
Accepted: 7 September 2005
We have measured the pressure sensitivity of Tc in fluorinated (Hg-1223) ceramic samples with different F contents, applying pressures up to 30. We obtained that Tc increases with increasing pressure, reaching different maximum values, depending on the F doping level, and decreases for a further increase of pressure. A new high Tc record () was achieved by applying pressure (23) in a fluorinated Hg-1223 sample near the optimum doping level. Our results show that all our samples are at the optimal doping, and that fluorine incorporation decreases the crystallographic a-parameter concomitantly increasing the maximum attainable Tc. This effect reveals that the compression of the a-axis is one of the keys that controls the Tc of high-temperature superconductors.
PACS: 74.72.Jt – Other cuprates, including Tl and Hg-based cuprates / 74.62.Fj – Pressure effects
© EDP Sciences, 2005
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