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Title: Frustrated spin- 1 2 molecular magnetism in the mixed-valence antiferromagnets Ba 3 M Ru 2 O 9 ( M = In , Y, Lu)

Journal Article · · Physical Review B

We have performed magnetic susceptibility, heat capacity, muon spin relaxation, and neutron-scattering measurements on three members of the family Ba3MRu2O9, where M=In, Y, and Lu. These systems consist of mixed-valence Ru dimers on a triangular lattice with antiferromagnetic interdimer exchange. Although previous work has argued that charge order within the dimers or intradimer double exchange plays an important role in determining the magnetic properties, our results suggest that the dimers are better described as molecular units due to significant orbital hybridization, resulting in one spin-1/2 moment distributed equally over the two Ru sites. These molecular building blocks form a frustrated, quasi-two-dimensional triangular lattice. Our zero- and longitudinal-field μSR results indicate that the molecular moments develop a collective, static magnetic ground state, with oscillations of the zero-field muon spin polarization indicative of long-range magnetic order in the Lu sample. In conclusion, the static magnetism is much more disordered in the Y and In samples, but they do not appear to be conventional spin glasses.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; DMR-1350002; DMR-1420451
OSTI ID:
1423110
Journal Information:
Physical Review B, Vol. 95, Issue 18; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

References (32)

Singlet Ground State of the Quantum Antiferromagnet Ba 3 CuSb 2 O 9 journal September 2012
Spin dynamics in the S = 1 2 quantum kagome compound vesignieite, Cu 3 Ba(VO 5 H) 2 journal May 2011
Magnetic, and electronic properties of a Ba3InRu2O9 single crystal journal December 2007
Magnetization Process and Collective Excitations in the S = 1 / 2 Triangular-Lattice Heisenberg Antiferromagnet Ba 3 CoSb 2 O 9 journal June 2013
Gapless quantum spin liquid ground state in the spin-1 antiferromagnet 6HB- Ba 3 NiSb 2 O 9 journal June 2016
Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice journal May 2012
Spin-liquid behavior in J eff = 1 2 triangular lattice compound Ba 3 IrTi 2 O 9 journal October 2012
Charge Order at the Frontier between the Molecular and Solid States in Ba 3 NaRu 2 O 9 journal May 2012
Recent advances in magnetic structure determination by neutron powder diffraction journal October 1993
Competition between supersolid phases and magnetization plateaus in the frustrated easy-axis antiferromagnet on a triangular lattice journal April 2011
Evidence for a spinon Fermi surface in the triangular S = 1 quantum spin liquid Ba 3 NiSb 2 O 9 journal February 2017
Absence of Jahn−Teller transition in the hexagonal Ba 3 CuSb 2 O 9 single crystal journal July 2015
Spin Liquid State in the S = 1 / 2 Triangular Lattice Ba 3 CuSb 2 O 9 journal April 2011
Thermal Hall Effect in a Phonon-Glass Ba 3 CuSb 2 O 9 journal April 2017
High-Pressure Sequence of Ba 3 NiSb 2 O 9 Structural Phases: New S = 1 Quantum Spin Liquids Based on Ni 2 + journal November 2011
Spin-orbital interaction for face-sharing octahedra: Realization of a highly symmetric SU(4) model journal April 2015
Evidence for a phase transition in the spin glass Eu 0.4 Sr 0.6 S from dynamic susceptibility measurements journal July 1987
Orbital-dependent singlet dimers and orbital-selective Peierls transitions in transition-metal compounds journal April 2014
Crystal Structures and Magnetic Properties of 6H-Perovskites Ba3MRu2O9 (M=Y, In, La, Sm, Eu, and Lu) journal May 2002
Anisotropy-driven spin glass transition in the kagome antiferromagnet hydronium jarosite, (H 3 O)Fe 3 (SO 4 ) 2 (OH) 6 journal October 2008
Experimental Realization of a Spin- 1 / 2 Triangular-Lattice Heisenberg Antiferromagnet journal January 2012
Juxtaposition of spin freezing and long range order in a series of geometrically frustrated antiferromagnetic gadolinium garnets journal May 2013
Successive Phase Transitions and Extended Spin-Excitation Continuum in the S = 1 2 Triangular-Lattice Antiferromagnet Ba 3 CoSb 2 O 9 journal December 2012
Magnetic phase diagram of Ba 3 CoSb 2 O 9 as determined by ultrasound velocity measurements journal July 2015
Muon-spin-rotation and relaxation studies in (TMTSF ) 2 -X compounds journal September 1993
Covalent bonds against magnetism in transition metal compounds journal September 2016
Spin orders and lattice distortions of geometrically frustrated 6H-perovskites Ba 3 B Ru 2 O 9 ( B  = La 3 + , Nd 3 + , and Y 3 + ) journal April 2013
Organic and molecular magnets journal June 2004
Origin of the Spin-Orbital Liquid State in a Nearly J = 0 Iridate Ba 3 ZnIr 2 O 9 journal March 2016
Dynamical spin–orbital correlation in the frustrated magnet Ba3CuSb2O9 journal June 2013
Quantum phase diagram of the S = 1 2 triangular-lattice antiferromagnet Ba 3 CoSb 2 O 9 journal January 2015
Static Critical Behavior of the Spin-Freezing Transition in the Geometrically Frustrated Pyrochlore Antiferromagnet Y 2 Mo 2 O 7 journal February 1997

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