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Geometric Magnetic Frustration in Y<sub>2-x</sub>Bi<sub>x</sub>Ru<sub>2</sub>O<sub>7</sub> Pyrochlores across the Metal-Insulator transition

ORAL

Abstract

Systems based on a triangular or pyrochlore lattice of corner sharing tetrahedra with nearest neighbor antiferromagnetic exchange interactions are the archetypal examples of geometric magnetic frustration, offering a means of accessing novel ground states. Magnetic systems based on 4d and 5d transition metal ions on the pyrochlore lattice offer a unique opportunity to explore the exotic ground states which potentially arise when the electron-electron Coulomb interaction, electronic bandwidth and spin orbit coupling are all of comparable magnitude. I will describe magnetization and muon spin relaxation investigations of a series of 4d Ru4+ based pyrochlores, which may be controllably tuned through a metal insulator transition, providing insight into the magnetic correlations as these finely balanced systems evolve from a localized to itinerant spin character.

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Presenters

  • Sarah Dunsiger

    CMMS, TRIUMF, TRIUMF, Centre for Molecular and Materials Science, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada

Authors

  • Sarah Dunsiger

    CMMS, TRIUMF, TRIUMF, Centre for Molecular and Materials Science, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada

  • Sang-Wook Cheong

    Rutgers University, R-CEM & Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA, Rutgers Center for Emergent Materials, Rutgers University, Department of Physics and Astronomy, Center for Emergent Materials, Rutgers University; Max Planck POSTECH/Korea Research Initiative, Pohang University of Science and Technol, Physics and Astronomy, Rutgers University, Rutgers University, Physics and Astronomy, and Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA, Rutgers University, Piscataway, Department of Physics and Astronomy, Rutgers University, New Brunswick, Department of Physics and Astronomy, Rutgers University, Department of Physics, Rutgers University, Physics & Astronomy, Rutgers University, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Rutgers University, New Brunswick, Physics, Rutgers University, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Kim Hooh Chow

    Physics, University of Alberta

  • Martin H Dehn

    University of British Columbia, Physics and Astronomy, University of British Columbia

  • Shayan Gheidi

    Simon Fraser Univ, Physics, Simon Fraser University, Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada

  • Namjung Hur

    Physics, Inha University

  • Kee Hoon Kim

    Physics and Astronomy, Seoul National University

  • Graeme Luke

    McMaster Univ, Physics and Astronomy, McMaster University, Department of Physics & Astronomy, McMaster University, McMaster University

  • Gerald Morris

    TRIUMF

  • Timothy Munsie

    Physics and Astronomy, McMaster University, Department of Physics & Astronomy, McMaster University

  • Jeff Sonier

    Simon Fraser Univ, Physics, Simon Fraser University, Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada

  • Shyam Sundar

    Simon Fraser Univ, Physics, Simon Fraser University, Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada