Abstract
Polar materials can host a variety of topologically significant magnetic phases, which often emerge from a modulated magnetic ground state. Relatively few noncentrosymmetric tetragonal materials have been shown to host topological spin textures and new candidate materials are necessary to expand the current theoretical models. This manuscript reports on the anisotropic magnetism in the polar, tetragonal material NdCoGe3 via thermodynamic and neutron diffraction measurements. The previously reported H-T phase diagram is updated to include several additional phases, which exist for both H = 0 and with an applied field H S c. Neutron diffraction data reveal that the magnetic structures below TN1 = 3.70 K and TN2 = 3.50 K are incommensurate, with a ground-state magnetic order that is incommensurate in all directions with the propagation vector k - = (0.494, 0.0044, 0.385) at 1.8 K. A unique magnetic structure solution is not achievable, but the possible single-k - and multi-k - spin models are discussed. These results demonstrate that NdCoGe3 hosts complicated magnetic order derived from modulated magnetic moments.
| Original language | English |
|---|---|
| Article number | 014426 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 19 2021 |
Funding
We thank J. M. Perez-Mato, Z. Wang, and W. Meier for useful discussions. This research was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. G.P. and H.S.A. were supported by the Gordon and Betty Moore Foundations EPiQS Initiative through Grant No. GBMF4416. This research used resources at the Spallation Neutron Source and High Flux Isotope Reactor, DOE Office of Science User Facilities operated by the Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan. We thank J. M. Perez-Mato, Z. Wang, and W. Meier for useful discussions. This research was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. G.P. and H.S.A. were supported by the Gordon and Betty Moore Foundations EPiQS Initiative through Grant No. GBMF4416. This research used resources at the Spallation Neutron Source and High Flux Isotope Reactor, DOE Office of Science User Facilities operated by the Oak Ridge National laboratory. This manuscript has been authored by UT-Battelle, llC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan.