%0 Generic %1 Nicklas2010 %A Nicklas, M. %A Kumar, M. %A Lengyel, E. %A Schnelle, W. %A Leithe-Jasper, A. %D 2010 %K Eu122 %T Competition of local-moment ferromagnetism and superconductivity in Co-substituted EuFe2As2 %U http://arxiv.org/abs/1006.3471 %X In contrast to SrFe2As2, where only the iron possesses a magnetic moment, in EuFe2As2 an additional large, local magnetic moment is carried by Eu2+. Like SrFe2As2, EuFe2As2 exhibits a spin-density wave transition at high temperatures, but in addition the magnetic moments of the Eu2+ order at around 20 K. The interplay of pressure-induced superconductivity and the Eu2+ order leads to a behavior which is reminiscent of re-entrant superconductivity as it was observed, for example, in the ternary Chevrel phases or in the rare-earth nickel borocarbides. Here, we study the delicate interplay of the ordering of the Eu2+ moments and superconductivity in EuFe1.9Co0.1As2, where application of external pressure makes it possible to sensitively tune the ratio of the magnetic (T_C) and the superconducting (T_c,onset) critical temperatures. We find that superconductivity disappears once T_C > T_c,onset.

@misc{Nicklas2010, abstract = { In contrast to SrFe2As2, where only the iron possesses a magnetic moment, in EuFe2As2 an additional large, local magnetic moment is carried by Eu2+. Like SrFe2As2, EuFe2As2 exhibits a spin-density wave transition at high temperatures, but in addition the magnetic moments of the Eu2+ order at around 20 K. The interplay of pressure-induced superconductivity and the Eu2+ order leads to a behavior which is reminiscent of re-entrant superconductivity as it was observed, for example, in the ternary Chevrel phases or in the rare-earth nickel borocarbides. Here, we study the delicate interplay of the ordering of the Eu2+ moments and superconductivity in EuFe1.9Co0.1As2, where application of external pressure makes it possible to sensitively tune the ratio of the magnetic (T_C) and the superconducting (T_{c,onset}) critical temperatures. We find that superconductivity disappears once T_C > T_{c,onset}. }, added-at = {2010-06-18T15:00:06.000+0200}, author = {Nicklas, M. and Kumar, M. and Lengyel, E. and Schnelle, W. and Leithe-Jasper, A.}, biburl = {https://www.bibsonomy.org/bibtex/2efa6d96b28404c856417854f4a55e531/bsipos}, description = {Competition of local-moment ferromagnetism and superconductivity in Co-substituted EuFe2As2}, interhash = {71259d2510e2172c5240159fb91568eb}, intrahash = {efa6d96b28404c856417854f4a55e531}, keywords = {Eu122}, note = {cite arxiv:1006.3471 Comment: 4 pages, 4 figures, submitted to the proceedings of SCES2010}, timestamp = {2010-06-18T15:00:06.000+0200}, title = {Competition of local-moment ferromagnetism and superconductivity in Co-substituted EuFe2As2}, url = {http://arxiv.org/abs/1006.3471}, year = 2010 }