Physics and Astronomy, Ames Laboratory
Journal or Book Title
Physical Review B
Rare-earth (R) half-Heusler compounds RBiPt exhibit a wide spectrum of interesting ground states. We have employed x-ray resonant magnetic scattering to elucidate the microscopic details of the magnetic structure in GdBiPt below TN=8.5 K. Experiments at the Gd L2 absorption edge show that the Gd moments order in an antiferromagnetic stacking along the cubic diagonal  direction, satisfying one of the requirements for an antiferromagnetic topological insulator as proposed previously, where both time-reversal symmetry and lattice translational symmetry are broken, but their product is conserved.
American Physical Society
Kreyssig, Andreas; Kim, M. G.; Kim, J. W.; Pratt, D. K.; Sauerbrei, S. M.; March, S. D.; Tesdall, G. R.; Bud’ko, Sergey L.; Canfield, Paul C.; McQueeney, Robert J.; and Goldman, Alan I., "Magnetic order in GdBiPt studied by x-ray resonant magnetic scattering" (2011). Physics and Astronomy Publications. 680.