The low temperature magnetic structure of superconducting FeTeO$_{\mathrm{x}}$ films

ORAL

Abstract

We compare the temperature dependent magnetic structure of superconducting FeTeO$_{\mathrm{x}}$ and non-superconducting FeTe films using neutron diffraction. Both show an antiferromagnetic transition below 70 K. The major difference between the two is that the superconducting FeTeO$_{\mathrm{x}}$ film shows a distinct reduction in magnetic order around the superconducting transition temperature (13 K) while the non-superconducting FeTe film shows a smoothly developing magnetic order as a function of temperature. Preliminary M\"{o}ssbauer spectroscopy studies done on the superconducting FeTeO$_{\mathrm{x}}$ indicate that film undergoes an antiferromagnetic transition below 50 K and magnetic order still exists in superconducting state.

*Supported by DOE/BES through contract DE-FG02-00ER45801 (Uconn).

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Authors

  • L.K. Narangammana

    • University of Connecticut, Storrs, CT 06269

  • J.I. Budnick

    • University of Connecticut
    • University of Connecticut, Storrs, CT 06269

  • W.A. Hines

    • University of Connecticut
    • University of Connecticut, Storrs, CT 06269

  • C. Niedermayer

    • Laboratory for Neutron Scattering, Paul Scherrer Institut
    • Paul Scherrer Institut Villigen, PSI, Switzerland

  • Esen Alp

    • Argonne National Laboratory, Argonne, IL 60439
    • Argonna National Laboratory

  • W. Bi

    • Argonne National Laboratory, Argonne, IL 60439

  • D.G. Hinks

    • Argonne National Laboratory, Argonne, IL 60439

  • D.E. Brown

    • Argonne National Laboratory, Argonne, IL 60439

  • B.O. Wells

    • University of Connecticut
    • University of Connecticut, Storrs, CT 06269