Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2Sr2MgOsO6
Abstract
The influence of spin-orbit coupling (SOC) on the physical properties of the 5d2 system Sr2MgOsO6 is probed via a combination of magnetometry, specific heat measurements, elastic and inelastic neutron scattering, and density functional theory calculations. Although a significant degree of frustration is expected, we find that Sr2MgOsO6 orders in a type I antiferromagnetic structure at the remarkably high temperature of 108 K. The measurements presented allow for the first accurate quantification of the size of the magnetic moment in a 5d2 system of 0.60(2) μB a significantly reduced moment from the expected value for such a system. Furthermore, significant anisotropy is identified via a spin excitation gap, and we confirm by first principles calculations that SOC not only provides the magnetocrystalline anisotropy, but also plays a crucial role in determining both the ground state magnetic order and the moment size in this compound. In conclusion, through comparison to Sr2ScOsO6, it is demonstrated that SOC-induced anisotropy has the ability to relieve frustration in 5d2 systems relative to their 5d3 counterparts, providing an explanation of the high TN found in Sr2MgOsO6.
- Authors:
-
- The Ohio State Univ., Columbus, OH (United States). Dept of Chemistry and Biochemistry
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
- Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
- Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany); Dresden Univ. of Technology (Germany). Inst. for Solid State Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); Deutsche Forschungsgemeinschaft DFG
- OSTI Identifier:
- 1319201
- Grant/Contract Number:
- AC05-00OR22725; SC0001299; FG02- 09ER46577; DMR-1420451; WU595/5-1; DMR-1107637; WU 595/3-3
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Morrow, Ryan, Taylor, Alice E., Singh, D. J., Xiong, Jie, Rodan, Steven, Wolter, A. U. B., Wurmehl, Sabine, Büchner, Bernd, Stone, M. B., Kolesnikov, A. I., Aczel, Adam A., Christianson, A. D., and Woodward, Patrick M. Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2Sr2MgOsO6. United States: N. p., 2016.
Web. doi:10.1038/srep32462.
Morrow, Ryan, Taylor, Alice E., Singh, D. J., Xiong, Jie, Rodan, Steven, Wolter, A. U. B., Wurmehl, Sabine, Büchner, Bernd, Stone, M. B., Kolesnikov, A. I., Aczel, Adam A., Christianson, A. D., & Woodward, Patrick M. Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2Sr2MgOsO6. United States. https://doi.org/10.1038/srep32462
Morrow, Ryan, Taylor, Alice E., Singh, D. J., Xiong, Jie, Rodan, Steven, Wolter, A. U. B., Wurmehl, Sabine, Büchner, Bernd, Stone, M. B., Kolesnikov, A. I., Aczel, Adam A., Christianson, A. D., and Woodward, Patrick M. Tue .
"Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2Sr2MgOsO6". United States. https://doi.org/10.1038/srep32462. https://www.osti.gov/servlets/purl/1319201.
@article{osti_1319201,
title = {Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2Sr2MgOsO6},
author = {Morrow, Ryan and Taylor, Alice E. and Singh, D. J. and Xiong, Jie and Rodan, Steven and Wolter, A. U. B. and Wurmehl, Sabine and Büchner, Bernd and Stone, M. B. and Kolesnikov, A. I. and Aczel, Adam A. and Christianson, A. D. and Woodward, Patrick M.},
abstractNote = {The influence of spin-orbit coupling (SOC) on the physical properties of the 5d2 system Sr2MgOsO6 is probed via a combination of magnetometry, specific heat measurements, elastic and inelastic neutron scattering, and density functional theory calculations. Although a significant degree of frustration is expected, we find that Sr2MgOsO6 orders in a type I antiferromagnetic structure at the remarkably high temperature of 108 K. The measurements presented allow for the first accurate quantification of the size of the magnetic moment in a 5d2 system of 0.60(2) μB a significantly reduced moment from the expected value for such a system. Furthermore, significant anisotropy is identified via a spin excitation gap, and we confirm by first principles calculations that SOC not only provides the magnetocrystalline anisotropy, but also plays a crucial role in determining both the ground state magnetic order and the moment size in this compound. In conclusion, through comparison to Sr2ScOsO6, it is demonstrated that SOC-induced anisotropy has the ability to relieve frustration in 5d2 systems relative to their 5d3 counterparts, providing an explanation of the high TN found in Sr2MgOsO6.},
doi = {10.1038/srep32462},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Tue Aug 30 00:00:00 EDT 2016},
month = {Tue Aug 30 00:00:00 EDT 2016}
}
Web of Science
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