Electronic and magnetic properties of the cluster magnet Ba3LaRu2O9

Bulletin of the American Physical Society

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APS March Meeting 2020

Volume 65, Number 1

Monday–Friday, March 2–6, 2020; Denver, Colorado

Session W46: Low-Dimensional Magnetism and Single Molecule Magnets

8:00 AM–11:00 AM, Friday, March 6, 2020
Room: 708

Sponsoring Unit: GMAG
Chair: Selvan Demir, Michigan State Univ

Abstract: W46.00003 : Electronic and magnetic properties of the cluster magnet Ba₃LaRu₂O₉

Abstract

Presenter:

Qiang Chen
(Department of Physics and Astronomy, University of Tennessee, Knoxville)

Authors:

Qiang Chen
(Department of Physics and Astronomy, University of Tennessee, Knoxville)

Amanda Clune
(Department of Chemistry, University of Tennessee, Knoxville)

Jie Ma
(Department of Physics and Astronomy, Shanghai Jiaotong University)

Jinguang Cheng
(Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

Keith Taddei
(Neutron Scattering Division, Oak Ridge National Laboratory)

Clarina Reloj Dela Cruz
(Neutron Scattering Division, Oak Ridge National Laboratory)

Matthew Stone
(Neutron Scattering Division, Oak Ridge National Laboratory)

Alexander Kolesnikov
(Neutron Scattering Division, Oak Ridge National Laboratory)

Janice Lynn Musfeldt
(Department of Chemistry, University of Tennessee, Knoxville)

Haidong Zhou
(Department of Physics and Astronomy, University of Tennessee, Knoxville)

Adam Aczel
(Neutron Scattering Division, Oak Ridge National Laboratory)

Magnetic materials with electrons delocalized over small molecular clusters, so-called cluster Mott insulators, have recently attracted significant interest in the quest for novel magnetic properties. The extremely short metal-metal distances within the molecular clusters promote significant electron hopping, thus leading to the formation of unusual electronic ground state configurations based on quasi-molecular orbitals. In this talk, we discuss the electronic and magnetic properties of the cluster magnet Ba₃LaRu₂O₉. We present magnetic susceptibility and inelastic neutron scattering data supporting an unusual spin-3/2 per dimer electronic ground state that cannot be understood in a local moment picture. We also present bulk characterization, muon spin relaxation, neutron diffraction, and inelastic neutron scattering data that are indicative of an ordered state arising from a quasi-2D frustrated lattice of Ru dimer building blocks. Finally, we present preliminary results of Raman spectroscopy and neutron diffraction under pressure that reveal a coincident structural/spin state transition at ~1 GPa.

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Bulletin of the American Physical Society

APS March Meeting 2020

Volume 65, Number 1

Monday–Friday, March 2–6, 2020; Denver, Colorado

Session W46: Low-Dimensional Magnetism and Single Molecule Magnets

Abstract: W46.00003 : Electronic and magnetic properties of the cluster magnet Ba3LaRu2O9

Presenter:

Authors:

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Abstract: W46.00003 : Electronic and magnetic properties of the cluster magnet Ba₃LaRu₂O₉