Abstract
We have determined the magnetic structure of the intermetallic compound Gd2Fe2Si2C using neutron powder diffraction, 155Gd and 57Fe Mössbauer spectroscopy. This compound crystallizes in a monoclinic (C2/m) structure and its magnetic structure is characterized by antiferromagnetic order of the Gd sublattice along the b-axis, with cell-doubling along the c-axis. The propagation vector is . At 3.6 K the Gd moment reaches 6.2(2) μB. Finally, 57Fe Mössbauer spectroscopy shows no evidence of magnetic ordering of the Fe sublattice.
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