Persistent short-range stripe-type magnetic order in overdoped Ba(Fe1-xCux)2As2 (0.145<=x<=0.553)

ORAL

Abstract

In the heavily Cu-doped regime where long-range stripe-type antiferromagnetic order in BaFe2As2 is suppressed, Ba(Fe1-xCux)2As2 (0.145≤x≤0.553) samples exhibit spin-glass-like behavior in magnetic susceptibility and insulating-like temperature dependence in electrical transport. Using elastic neutron scattering, we find stripe-type short-range magnetic order in the spin-glass region identified by susceptibility measurements. The persistent stripe order in Ba(Fe1-xCux)2As2 likely result from Cu acting effectively as vacancies, relieving magnetic frustration. The behaviors in Ba(Fe1-xCux)2As2 are compared with those in NaFe1-xCuxAs and Fe1-xCuxTe, suggesting a common tendency towards stripe-type magnetic order in these materials.

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Presenters

  • Yu Song

    University of California Berkeley, Univ of California - Berkeley

Authors

  • Weiyi Wang

    Rice Univeristy, Rice University

  • Yu Song

    University of California Berkeley, Univ of California - Berkeley

  • Ding Hu

    Rice University

  • Yu Li

    Physics and Astronomy, Rice University, Rice University

  • Rui Zhang

    Rice University

  • Leland Harriger

    NIST Center for Neutron Research, NCNR, NIST, National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, NIST center for Neutron Scattering

  • Wei Tian

    Oak Ridge National Laboratory, Neutron Sciences Directorate, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Lab

  • Huibo Cao

    Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Neutron Sciences Directorate, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Lab, Oak Ridge National Lab, Oak Ridge Natl Lab, Quantum Condensed Matter Division , Oak Ridge National Laboratory

  • Pengcheng Dai

    Physics and Astronomy, Rice University, Rice University, Physics, Rice University, Rice Univeristy