Journal or Book Title
Physical Review B
We report results from neutron scattering experiments on single crystals of YbBiPt that demonstrate antiferromagnetic order characterized by a propagation vector, τAFM = (121212), and ordered moments that align along the [1 1 1] direction of the cubic unit cell. We describe the scattering in terms of a two-Gaussian peak fit, which consists of a narrower component that appears below TN≈0.4 K and corresponds to a magnetic correlation length of ξn≈ 80 Å, and a broad component that persists up to T∗≈ 0.7 K and corresponds to antiferromagnetic correlations extending over ξb≈ 20 Å. Our results illustrate the fragile magnetic order present in YbBiPt and provide a path forward for microscopic investigations of the ground states and fluctuations associated with the purported quantum critical point in this heavy-fermion compound.
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Ueland, Benjamin G.; Kreyssig, Andreas; Prokeš, K.; Lynn, J. W.; Harriger, L. W.; Pratt, D. K.; Singh, D. K.; Heitmann, T. W.; Sauerbrei, S.; Saunders, Scott M.; Mun, E. D.; Bud'ko, Sergey L.; McQueeney, Robert J.; Canfield, Paul C.; and Goldman, Alan I., "Fragile antiferromagnetism in the heavy-fermion compound YbBiPt" (2014). Ames Laboratory Publications. 251.