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American Physical Society, Physical review B, 1(89), 2014

DOI: 10.1103/physrevb.89.014512

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Coexistence of superconductivity and ferromagnetism in P-dopedEuFe2As2

Journal article published in 2014 by S. Nandi, W. T. Jin, Y. Xiao, Y. Su ORCID, S. Price, D. K. Shukla, J. Strempfer, H. S. Jeevan, P. Gegenwart, T.-H. Brückel
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The magnetic structure of the Eu2+ moments in the superconducting EuFe2(As1−xPx)2 sample with x=0.15 has been determined using element-specific x-ray resonant magnetic scattering. Combining magnetic, thermodynamic, and scattering measurements, we conclude that the long-range ferromagnetic order of the Eu2+ moments aligned primarily along the c axis coexists with the bulk superconductivity at zero field. At an applied magnetic field ≥0.6 T, superconductivity still coexists with the ferromagnetic Eu2+ moments, which are polarized along the field direction. We propose a spontaneous vortex state for the coexistence of superconductivity and ferromagnetism in EuFe2(As0.85P0.15)2.