Magnetic order in GdBiPt studied by x-ray resonant magnetic scattering

Details Magnetic order in GdBiPt studied by x-ray resonant magnetic scattering Magnetic order in GdBiPt studied by x-ray resonant magnetic scattering

2011-09-16

arxiv.org/abs/1109.3521v1

Phys. Rev. B 84, 220408(R) (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.84.220408

Rare earth (R) half-Heusler compounds, RBiPt, exhibit a wide spectrum of novel ground states. Recently, GdBiPt has been proposed as a potential antiferromagnetic topological insulator (AFTI). We have employed x-ray resonant magnetic scattering to elucidate the microscopic details of the magnetic structure in GdBiPt below T_N = 8.5 K. Experiments at the Gd L_2 absorption edge show that the Gd moments order in an antiferromagnetic stacking along the cubic diagonal [1 1 1] direction satisfying the requirement for an AFTI, where both time-reversal symmetry and lattice translational symmetry are broken, but their product is conserved.

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