Abstract
We report the discovery of incommensurate magnetism near quantum criticality in CeNiAsO through neutron scattering and zero field muon spin rotation. For T<TN1=8.7(3) K, a second order phase transition yields an incommensurate spin density with a wave vector k=(0.44(4),0,0). For T<TN2=7.6(3) K, we find coplanar commensurate order with a moment of 0.37(5)μB, reduced to 30% of the saturation moment of the |±12.
| Original language | English |
|---|---|
| Article number | 197203 |
| Journal | Physical Review Letters |
| Volume | 122 |
| Issue number | 19 |
| DOIs | |
| State | Published - May 15 2019 |
Funding
We thank Gerald Morris, Bassam Hitti, and Iain McKenzie for beam line support, Sky Cheung and Yipeng Cai for assistance during the experiment, and Allen Scheie for useful discussions on crystal field analysis. This research was funded by the U.S. Department of Energy, office of Basic Energy Sciences, Division of Material Sciences and Engineering under Grant No. DE-SC0019331 and by the Gordon and Betty Moore foundation through Grant no. GBMF4532. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Activities at Columbia and TRIUMF were supported by Grants No. NSF DMR-1436095 (DMREF) and No. DMR-1610633, and the REIMEI project of Japan Atomic Energy Agency.