Fragile antiferromagnetism in the heavy-fermion compound YbBiPt

Abstract

We report results from neutron scattering experiments on single crystals of YbBiPt that demonstrate antiferromagnetic order characterized by a propagation vector, ${\tau }_{\mathrm{AFM}}$ = ($\frac{1}{2}\frac{1}{2}\frac{1}{2}$), 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-Gaussian peak fit, which consists of a narrower component that appears below $T_{\mathrm{N}}\approx 0.4$ K and corresponds to a magnetic correlation length of ${\xi }_{\mathrm{n}}\approx$ 80 $\mathring{\mathrm{A}}$, and a broad component that persists up to $T^{\ast }\approx$ 0.7 K and corresponds to antiferromagnetic correlations extending over ${\xi }_{\mathrm{b}}\approx$ 20 $\mathring{\mathrm{A}}$. 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.

5 pages, 3 figures

References in corpus (5)

• Heavy Fermions and Quantum Phase Transitions
• Weak magnetism and non-Fermi liquids near heavy-fermion critical points
• Antiferromagnetic criticality at a heavy-fermion quantum phase transition
• Magnetic field tuned quantum criticality of heavy fermion system YbPtBi
• Field-induced non-Fermi-liquid resistivity of stoichiometric YbAgGe single crystals

Cited by in corpus (4)

• Field-induced magnetic phase transitions and the resultant giant anomalous Hall effect in antiferromagnetic half-Heusler DyPtBi
• Magnon spectrum of the Weyl semimetal half-Heusler compound GdPtBi
• Effects of a magnetic field on the fragile antiferromagnetism in YbBiPt
• Magnetic order and instability in newly synthesized CoSeAs marcasite