Abstract
In this paper we report low-temperature magnetic properties of the rare-earth perovskite material YbAlO3. Results of elastic and inelastic neutron scattering experiment, magnetization measurements along with the crystalline electrical field (CEF) calculations, suggest that the ground state of Yb moments is a strongly anisotropic Kramers doublet, and the moments are confined in the ab plane, pointing at an angle of φ=±23.5° to the a axis. With temperature decreasing below TN=0.88 K, Yb moments order into the coplanar but noncollinear antiferromagnetic (AFM) structure AxGy, where the moments are pointed along their easy axes. In addition, we highlight the importance of the dipole-dipole interaction, which selects the type of magnetic ordering and may be crucial for understanding magnetic properties of other rare-earth orthorhombic perovskites. Further analysis of the broad diffuse neutron scattering shows that one-dimensional interaction along the c axis is dominant and suggests YbAlO3 as a new member of one-dimensional quantum magnets.
| Original language | English |
|---|---|
| Article number | 195117 |
| Journal | Physical Review B |
| Volume | 99 |
| Issue number | 19 |
| DOIs | |
| State | Published - May 9 2019 |
Funding
We would like to thank G. Loutts for providing the single crystal sample and Z. Wang, C. D. Batista, I. Zaliznyak, A. Tsvelik, F. Ronning, M. C. Aronson, E-J. Guo, and J. Sheng for helpful discussions. This research used resources at the High Flux Isotope Reactor and Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Research supported in part by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy. This work is partly supported by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), Materials Science and Engineering Division. S.E.N. acknowledges support from the International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM). A.D.C. is partially supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. L.V. acknowledges Ukrainian Ministry of Education and Sciences for partial support under project “Feryt”. M.B. would like to thank the DFG for financial support from project BR 4110/1-1.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| California Department of Fish and Game | BR 4110/1-1 |
| Office of Science | |
| Basic Energy Sciences | |
| Oak Ridge National Laboratory | |
| Division of Materials Sciences and Engineering | |
| Ministry of Education and Science of Ukraine | |
| International Max Planck Research School for Chemistry and Physics of Quantum Materials |