Interplay of antiferromagnetism, ferromagnetism, and superconductivity in EuFe2(As1xPx)2 single crystals

H. S. Jeevan, Deepa Kasinathan, Helge Rosner, and Philipp Gegenwart
Phys. Rev. B 83, 054511 – Published 22 February 2011

Abstract

We report a systematic study of the influence of antiferromagnetic and ferromagnetic phases of Eu2+ moments on the superconducting phase upon doping the As site by isovalent P, which essentially acts like chemical pressure on EuFe2As2. Bulk superconductivity with transition temperatures of 22 and 28 K are observed for x=0.16 and 0.20 samples, respectively. The Eu ions order antiferromagnetically for x 0.13, while bulk superconductivity coexists with Eu-antiferromagnetism for 0.13 < x<0.22. In contrast, a crossover is observed for x0.22 whereupon the Eu ions order ferromagnetically and superconductivity is fully suppressed. Density-functional-theory-based calculations reproduce the observed experimental findings consistently. We discuss in detail the coexistence of superconductivity and magnetism in a tiny region of the phase space and comment on the competition of ferromagnetism and superconductivity in the title compound.

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  • Received 8 December 2010

DOI:https://doi.org/10.1103/PhysRevB.83.054511

©2011 American Physical Society

Authors & Affiliations

H. S. Jeevan1, Deepa Kasinathan2, Helge Rosner2, and Philipp Gegenwart1

  • 1I. Physikalisches Institut, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany
  • 2Max-Planck-Institut für Chemische Physik fester Stoffe, D-01187 Dresden, Germany

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Issue

Vol. 83, Iss. 5 — 1 February 2011

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