In the frustrated fcc metal HoInCu4, measured exchanges J1 and J2 with J2/J1 = 0.45(5) match between two independent neutron experiments, and the zero-field state shows overdamped excitations plus a ~30% quantum-driven reduction of the ordered moment.
Vojta, Frustration and quantum criticality, Reports on Progress in Physics 81, 064501 (2018)
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Microscopic Origin of Reduced Magnetic Order in a Frustrated Metal
In the frustrated fcc metal HoInCu4, measured exchanges J1 and J2 with J2/J1 = 0.45(5) match between two independent neutron experiments, and the zero-field state shows overdamped excitations plus a ~30% quantum-driven reduction of the ordered moment.