Structure-Based Phase Diagram of LaFeAs<sub>x</sub>P<sub>1-x</sub>O 1111 System

ORAL

Abstract

In this talk, I will be reporting the structural and physical properties of high quality powder samples of LaFeAsxP1-xO from x=0 to x=1 examined using high resolution x-ray and neutron diffraction. This system is of interest due to similarities to the 122 system where novel magnetic phases were discovered in co-existence with superconductivity. To investigate such similarities, multiple samples bordering reported antiferromagnetic and superconducting regions were prepared. While preliminary analysis confirms the existence of AFM properties with low P doping, neutron data revealed no evidence for the AFM2 phase that was previously reported in the literature centered around x=0.5. I will be discussing the full details of the current state of the phase diagram.

*Work at ANL was supported by U.S. DOE, BES, DMSE. Research at ORNL’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, BES, US DOE. Research at RAL was supported by the Science and Technology Facilities Council (STFC).

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Presenters

  • Ryan Stadel

    • Physics, Northern Illinois Univ

Authors

  • Ryan Stadel

    • Physics, Northern Illinois Univ

  • Omar Chmaissem

    • Physics, Northern Illinois Univ
    • Northern Illinois Univ
    • Physics, Northern Illinois University

  • Stephan Rosenkranz

    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • MSD, Argonne National Laboratory
    • Argonne Nat'l Lab

  • Raymond Osborn

    • Materials Science Division, Argonne National Laboratory
    • MSD, Argonne National Laboratory
    • Argonne Nat'l Lab

  • Matthew Krogstad

    • Physics, Northern Illinois Univ
    • Northern Illinois Univ
    • Materials Science Division, Argonne National Laboratory