Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2Sr2MgOsO6 [electronic resource].
- Arlington, Va. : National Science Foundation (U.S.), 2016. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 32,462 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory, National Science Foundation (U.S.), United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- 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.
- Published through SciTech Connect., 08/30/2016., "KC0402010", "ERKCSNX", Scientific Reports 6 ISSN 2045-2322 AM, Ryan Morrow; Alice E. Taylor; D. J. Singh; Jie Xiong; Steven Rodan; A. U. B. Wolter; Sabine Wurmehl; Bernd Büchner; M. B. Stone; A. I. Kolesnikov; Adam A. Aczel; A. D. Christianson; Patrick M. Woodward., and Deutsche Forschungsgemeinschaft DFG
- Funding Information:
- AC05-00OR22725, SC0001299, FG02- 09ER46577, DMR-1420451, WU595/5-1, DMR-1107637, and WU 595/3-3
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