The structural and magnetic phase transitions in a ``parent'' Fe pnictide compound

ORAL

Abstract

We will present transport, thermodynamic, synchrotron X-ray, neutron diffraction, $\mu $SR, ARPES and polarized optical image measurements on the ``parent'' compound of the 112 high Tc superconducting Fe pnictide family. Structural and magnetic phase transitions are revealed. Detailed magnetic structure was solved by single crystal neutron diffraction. We will discuss the similarity and difference of these transitions comparing to the parent compounds of other Fe pnictide superconductors.

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Authors

  • Ni Ni

    Univ of California - Los Angeles, Department of Physics and Astronomy, University of California, Los Angeles

  • Jared Allred

    Argonne National Laboratory (ANL), Materials Science Division, Argonne National Laboratory, Argonne National Laboratory, Argonne Natl Lab

  • Huibo Cao

    Oak Ridge National Laboratory, Oak Ridge National Lab, Quantum Condensed Matter Division, Oak Ridge National Laboratory

  • W. Tian

    Quantum Condensed Matter Division, ORNL, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA, Oak Ridge Natl Lab, TN, USA

  • Lian Liu

    Department of Physics, Columbia University

  • Kyuil Cho

    Ames Laboratory and Iowa State University, USA, Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Matthew Krogstad

    Northern Illinois University, Materials Science Division, Argonne National Laboratory

  • J. Ma

    Quantum Condensed Matter Division, ORNL, Oak Ridge National Laboratory, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge Natl Lab, TN, USA

  • Keith Taddei

    Northern Illinois University, Materials Science Division, Argonne National Laboratory

  • Makariy Tanatar

    Ames Laboratory USDOE, Ames, IA 50011, Ames Laboratory and Iowa State University, USA, Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Ruslan Prozorov

    Ames Laboratory and Iowa State University, USA, Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • M. Matsuda

    Quantum Condensed Matter Division, ORNL, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge Natl Lab, TN, USA

  • Stephan Rosenkranz

    ANL, Materials Science Division, Argonne National Laboratory

  • Yasutomo Uemura

    Department of Physics, Columbia University

  • Shan Jiang

    Univ of California - Los Angeles, Department of Physics and Astronomy, University of California, Los Angeles