Abstract
We present a quantitative experimental investigation of the scalar chiral magnetic order with in . Static magnetization reveals a net ferromagnetic ground state, and inelastic neutron scattering from the hyperfine coupled nuclear spin reveals a local ordered moment of 1.76(6) , just 61(2)% of the saturated moment size. The experiments exclude static disorder as the source of the reduced moment. A 38(1) gap in the magnetic excitation spectrum inferred from heat capacity rules out thermal fluctuations and suggests a multipolar explanation for the moment reduction. We compare to Nd pyrochlores and show that is in a spin fragmented state using nuclear Schottky heat capacity.
- Received 25 April 2019
DOI:https://doi.org/10.1103/PhysRevB.100.024414
©2019 American Physical Society