Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
4-1-2012
Journal or Book Title
Physical Review B
Volume
85
Issue
14
First Page
140514(R)
DOI
10.1103/PhysRevB.85.140514
Abstract
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, ξmag>2800 and >850 Å, 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 Néel 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.
Copyright Owner
American Physical Society
Copyright Date
2012
Language
en
File Format
application/pdf
Recommended Citation
Dean, M. P. M.; Kim, M. G.; Kreyssig, Andreas; Kim, J. W.; Liu, X.; Ryan, P. J.; Thaler, A.; Bud’ko, Sergey L.; Strassheim, W.; Canfield, Paul C.; Hill, J. P.; and Goldman, Alan I., "Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1-xIrx)(2)As-2" (2012). Physics and Astronomy Publications. 649.
https://lib.dr.iastate.edu/physastro_pubs/649
Comments
This article is published as Dean, M. P. M., M. G. Kim, A. Kreyssig, J. W. Kim, X. Liu, P. J. Ryan, A. Thaler, S. L. Bud’ko, W. Strassheim, P. C. Canfield, J. P. Hill, and A. I. Goldman. "Magnetically polarized Ir dopant atoms in superconducting Ba (Fe 1− x Ir x) 2 As 2." Physical Review B 85, no. 14 (2012): 140514(R). DOI: 10.1103/PhysRevB.85.140514. Posted with permission.