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Fragile Antiferromagnetism in the Heavy-Fermion Compound YbBiPt



B. G. Ueland, A. Kreyssig, K. Prokes, Jeffrey W. Lynn, Leland Harriger, D.K. Pratt, D.K. Singh, T.W. Heitmann, S. Sauerbrei, S.M. Saunders, E. D. Mun, S. L. Bud'Ko, R.J. McQueeney, P. C. Canfield, A. I. Goldman


We report results from neutron scattering experiments on single crystals of YbBiPt that demonstrate antiferromagnetic order characterized by a propagation vector τAFM = (1/2,1/2,1/2}), 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-Gaussin peak fit, which length of ξb approximately equal} 80 A, and a broad component that persists up to Τ approximately equal} 0.7 K and corresponds to antiferromagnetic correlations extending over ξb approximately equal} 20 A. 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.
Physical Review Letters


Heavy Fermion, Antiferromagnetic Order, YbBiPt, Neutron Diffraction


Ueland, B. , Kreyssig, A. , Prokes, K. , Lynn, J. , Harriger, L. , Pratt, D. , Singh, D. , Heitmann, T. , Sauerbrei, S. , Saunders, S. , Mun, E. , Bud'Ko, S. , McQueeney, R. , Canfield, P. and Goldman, A. (2014), Fragile Antiferromagnetism in the Heavy-Fermion Compound YbBiPt, Physical Review Letters, [online], (Accessed June 20, 2024)


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Created May 7, 2014, Updated October 12, 2021