Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1-xIrx)2As2

Dean, M. P.  M.; Kim, M. G.; Kreyssig, A.; Kim, J. W.; Liu, X.; Ryan, P. J.; Thaler, A.; Bud'ko, S. L.; Strassheim, W.; Canfield, P. C.; Hill, J. P.; Goldman, A. I.

doi:10.1103/PhysRevB.85.140514

Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1-xIrx)2As2

Journal Article · Wed Apr 25 00:00:00 EDT 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.140514· OSTI ID:1045008

Dean, M. P. M.; Kim, M. G.; Kreyssig, A.; Kim, J. W.; Liu, X.; Ryan, P. J.; Thaler, A.; Bud'ko, S. L.; Strassheim, W.; Canfield, P. C.; Hill, J. P.; Goldman, A. I.

We investigate the magnetic polarization of the Ir 5d dopant states in the pnictide superconductor Ba(Fe1-xIrx)2As2 with x=0.027(2) using Ir L3 edge x-ray resonant magnetic scattering (XRMS). Despite the fact that doping partially suppresses the antiferromagnetic transition, we find that magnetic order survives around the Ir dopant sites. The Ir states are magnetically polarized with commensurate stripe-like antiferromagnetic order and long correlations lengths, maggt;2800 and >850, in the ab plane and along the c axis, respectively, driven by their interaction with the Fe spins. This Ir magnetic order persists up to the Neel transition of the majority Fe spins at TN=74(2) K. At 5 K we find that magnetic order coexists microscopically with superconductivity in Ba(Fe1-xIrx)2As2. The energy dependence of the XRMS through the Ir L3 edge shows a non-Lorentzian line shape, which we explain in terms of interference between Ir resonant scattering and Fe nonresonant magnetic scattering.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1045008

Alternate ID(s):: OSTI ID: 1385510
OSTI ID: 1081149

Report Number(s):: IS-J 7686

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Vol. 85; ISSN 1098-0121

Country of Publication:: United States

Language:: English

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