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Title: High antiferromagnetic transition temperature of a honeycomb compound SrRu2O6

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [3];  [1];  [1];  [4];  [1];  [5];  [3];  [2];  [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. The Ohio State Univ., Columbus, OH (United States)
  3. RIKEN Center for Emergent Matter Science (CEMS), Wako (Japan)
  4. Beijing National Lab for Condensed Matter Physics, Chinese Academy of Sciences
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

We study the high-temperature magnetic order in a quasi-two-dimensional honeycomb compound SrRu2O6 by measuring magnetization and neutron powder diffraction with both polarized and unpolarized neutrons. SrRu2O6 crystallizes into the hexagonal lead antimonate (PbSb2O6, space group P31m) structure with layers of edge-sharing RuO6 octahedra separated by Sr2+ ions. SrRu2O6 is found to order at TN = 565 K with Ru moments coupled antiferromagnetically both in plane and out of plane. The magnetic moment is 1.30(2) μB/Ru at room temperature and is along the crystallographic c axis in the G-type magnetic structure. We perform density functional calculations with constrained random-phase approximation (RPA) to obtain the electronic structure and effective intra- and interorbital interaction parameters. The projected density of states shows strong hybridization between Ru 4d and O 2p. By downfolding to the target t2g bands we extract the effective magnetic Hamiltonian and perform Monte Carlo simulations to determine the transition temperature as a function of interand intraplane couplings. We find a weak interplane coupling, 3% of the strong intraplane coupling, permits three-dimensional magnetic order at the observed TN .

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1215599
Alternate ID(s):
OSTI ID: 1215780
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 10; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (6)

AgRuO 3 , a Strongly Exchange-Coupled Honeycomb Compound Lacking Long-Range Magnetic Order journal March 2017
High-throughput prediction of the ground-state collinear magnetic order of inorganic materials using Density Functional Theory journal June 2019
Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet journal March 2019
Localized-itinerant dichotomy and unconventional magnetism in SrRu2O6 journal September 2017
Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2 Sr2MgOsO6 journal August 2016
Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet text January 2019

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