EuFe2As2 magnetic structure determination
Abstract
Magnetic resonant X ray scattering experiments have been performed on a single crystal of EuFe2As2 at the Eu L3 absorption edge. This has permitted us to determine for the first time the orientation of Eu magnetic moments in the antiferromagnetic ordered phase below TN=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<TS~190 K). Temperature dependences indicate that the onset of the Eu AFM phase barely affects the Fe magnetic sublattice.
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