EuFe_2As_2 magnetic structure determination

Javier Herrero-Martin; Valerio Scagnoli; Claudio Mazzoli; Yixi Su; Ranjal Mittal; Y. Xiao; Th. Brückel; Neeraj Kumar; S. K. Dhar; A. Thamizhavel; Luigi Paolasini

EuFe_2As_2 magnetic structure determination

Strongly Correlated Electrons 2009-09-23 v3

Authors: Javier Herrero-Martin , Valerio Scagnoli , Claudio Mazzoli , Yixi Su , Ranjal Mittal , Y. Xiao , Th. Brückel , Neeraj Kumar , S. K. Dhar , A. Thamizhavel , Luigi Paolasini

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Abstract

Magnetic resonant X ray scattering experiments have been performed on a single crystal of EuFe_2As_2 at the Eu L_3 absorption edge. This has permitted us to determine for the first time the orientation of Eu magnetic moments in the antiferromagnetic ordered phase below T_N=19 K as parallel to the a-axis. In addition, non-resonant magnetic X ray measurements indicate that Fe magnetic moments align along the same direction in the spin density wave phase (T<T_S~190 K). Temperature dependences indicate that the onset of the Eu AFM phase barely affects the Fe magnetic sublattice.

Keywords

magnetic structure magnetic phase transitions magnetic materials and spin systems

Cite

@article{arxiv.0906.1508,
  title  = {EuFe_2As_2 magnetic structure determination},
  author = {Javier Herrero-Martin and Valerio Scagnoli and Claudio Mazzoli and Yixi Su and Ranjal Mittal and Y. Xiao and Th. Brückel and Neeraj Kumar and S. K. Dhar and A. Thamizhavel and Luigi Paolasini},
  journal= {arXiv preprint arXiv:0906.1508},
  year   = {2009}
}

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accepted for publication in Phys. Rev. B

EuFe_2As_2 magnetic structure determination

Abstract

Keywords

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