2008/08/14 by C. F. Miclea, C. Miclea, M. Nicklas +9 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.79.212509
published as Phys. Rev. B 79, 212509 (2009)
arxiv created 2008/08/14 · openalex publication_date 2009/06/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We studied the temperature-pressure phase diagram of EuFe2As2 by electrical resistivity measurements. The spin-density-wave transition at T0 associated with the FeAs-layers is continuously suppressed with increasing pressure, while the antiferromagnetic ordering temperature of the Eu2+ moments seems to be nearly pressure independent up to 2.6 GPa. Above 2 GPa a sharp drop of the resistivity, \ensuremathρ(T), indicates the onset of superconductivity at Tc\ensuremath≈29.5 K. Surprisingly, on further reducing the temperature, \ensuremathρ(T) is increasing again and exhibiting a maximum caused by the ordering of the Eu2+ moments, a behavior which is reminiscent of reentrant superconductivity as it is observed in the ternary Chevrel phases or in the rare-earth nickel borocarbides.