1. High-pressure effects in fluorinated HgBa 2 Ca 2 Cu 3 O 8 + δ
- Author
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Evgeny V. Antipov, S. N. Putilin, D. A. Pavlov, Manuel Núñez-Regueiro, M. Monteverde, K. A. Lokshin, and Carlos Acha
- Subjects
Superconductivity ,Pressure sensitivity ,High-temperature superconductivity ,Materials science ,Condensed matter physics ,Ciencias Físicas ,Condensed Matter - Superconductivity ,Doping ,Analytical chemistry ,FOS: Physical sciences ,General Physics and Astronomy ,chemistry.chemical_element ,Compression (physics) ,law.invention ,Astronomía ,Superconductivity (cond-mat.supr-con) ,chemistry ,law ,High pressure ,visual_art ,visual_art.visual_art_medium ,Fluorine ,Ceramic ,CIENCIAS NATURALES Y EXACTAS - Abstract
We have measured the pressure sensitivity of Tc in fluorinated HgBa2Ca2Cu3O(8+d) (Hg-1223) ceramic samples with different F contents, applying pressures up to 30 GPa. 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 (166 K +/- 1 K) was achieved by applying pressure (23 GPa) 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 $a$ axes is one of the keys that controls the Tc of high temperature superconductors., 4 pages, 4 figures, submitted to Phys. Rev. B
- Published
- 2005