Magnetic structure of EuFe2As2 as determined by resonant x-ray scattering

Javier Herrero-Martín, Valerio Scagnoli, Claudio Mazzoli, Yixi Su, Ranjan Mittal, Yinguo Xiao, Thomas Brueckel, Neeraj Kumar, S. K. Dhar, A. Thamizhavel, and Luigi Paolasini
Phys. Rev. B 80, 134411 – Published 13 October 2009

Abstract

Magnetic resonant x-ray scattering experiments have been performed on a single crystal of EuFe2As2 at the EuL3 absorption edge. The orientation of Eu magnetic moments was directly determined: in the antiferromagnetic (AFM) ordered phase they lay parallel to the crystallographic a axis. In addition, nonresonant magnetic x-ray measurements indicate that Fe magnetic moments are aligned along the same direction in the spin-density-wave phase. As deduced by temperature dependence of integrated intensities, the Fe magnetic arrangement seems to be insensitive to the onset of Eu AFM phase. Some speculations on the low-temperature space group are reported on the base of detected resonant reflections on forbidden Bragg positions.

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  • Received 3 June 2009

DOI:https://doi.org/10.1103/PhysRevB.80.134411

©2009 American Physical Society

Authors & Affiliations

Javier Herrero-Martín1, Valerio Scagnoli1, Claudio Mazzoli1, Yixi Su2, Ranjan Mittal2,3, Yinguo Xiao4, Thomas Brueckel2,4, Neeraj Kumar5, S. K. Dhar5, A. Thamizhavel5, and Luigi Paolasini1

  • 1European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex 9, France
  • 2Juelich Centre for Neutron Science, IFF, Forschungszentrum Juelich, Outstation at FRM II, Lichtenbergstrasse 1, D-85747 Garching, Germany
  • 3Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
  • 4Institut fuer Festkoerperforschung, Forschungszentrum Juelich, D-52425 Juelich, Germany
  • 5Department of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India

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Issue

Vol. 80, Iss. 13 — 1 October 2009

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