Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1-xIrx)(2)As-2
| Title | Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1-xIrx)(2)As-2 |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Dean MPM, Kim MG, Kreyssig A, Kim JW, Liu X, Ryan PJ, Thaler A, Bud'ko SL, Strassheim W, Canfield PC, Hill JP, Goldman AI |
| Journal Title | Physical Review B |
| Volume | 85 |
| Pages | 140514 |
| Date Published | 04 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000303192800002 |
| Keywords | bafe2as2, pnictides, scattering, state |
| Abstract | We investigate the magnetic polarization of the Ir 5d dopant states in the pnictide superconductor Ba(Fe1-xIrx)(2)As-2 with x = 0.027(2) using Ir L-3 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, xi(mag) > 2800 and > 850 angstrom, 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 T-N = 74(2) K. At 5 K we find that magnetic order coexists microscopically with superconductivity in Ba(Fe1-xIrx)(2)As-2. The energy dependence of the XRMS through the Ir L-3 edge shows a non-Lorentzian line shape, which we explain in terms of interference between Ir resonant scattering and Fe nonresonant magnetic scattering. |
| URL | <Go to ISI>://WOS:000303192800002 |
| DOI | 10.1103/PhysRevB.85.140514 |
| Alternate Journal | Phys. Rev. B |
