Abstract
We report neutron scattering, magnetic susceptibility and Monte Carlo theoretical analysis to verify the short-range nature of the magnetic structure and spin-spin correlations in a Yb3Ga5O12 single crystal. The quantum spin state of Yb3+ in Yb3Ga5O12 is verified. The quantum spins organize into a short-ranged emergent director state for T<0.6 K derived from anisotropy and near-neighbor exchange. We derive the magnitude of the near-neighbor exchange interactions 0.6<J1<0.7K,J2=0.12 K and the magnitude of the dipolar exchange interaction, D, in the range 0.18<D<0.21 K. Certain aspects of the broad experimental dataset can be modeled using a J1D model with ferromagnetic near-neighbor spin-spin correlations while other aspects of the data can be accurately reproduced using a J1J2D model with antiferromagnetic near-neighbor spin-spin correlation. As such, although we do not quantify all the relevant exchange interactions, we nevertheless provide a strong basis for the understanding of the complex Hamiltonian required to fully describe the magnetic state of Yb3Ga5O12.
| Original language | English |
|---|---|
| Article number | 064425 |
| Journal | Physical Review B |
| Volume | 104 |
| Issue number | 6 |
| DOIs | |
| State | Published - Aug 1 2021 |
Funding
This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the US Department of Energy. The U.S. Government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. 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 U.S. 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 . L.S., R.E., and I.M.B.B. were funded by Nordforsk through the NNSP project. This project was further supported by the Danish Agency for Science and Innovation though DANSCATT and Interreg. The work at the University of Warwick was funded by EPSRC, UK through Grant No. EP/T005963/1. This research used resources of the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory. We thank ILL and SNS for providing the facilities to perform the neutron scattering experiments. The authors would like to thank J. Jensen for valuable discussions.
| Funders | Funder number |
|---|---|
| Danish Agency for Science and Innovation though DANSCATT | |
| U.S. Department of Energy | |
| Interreg | |
| Engineering and Physical Sciences Research Council | EP/T005963/1 |
| NordForsk |