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.
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Authors
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L.K. Narangammana
University of Connecticut, Storrs, CT 06269
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J.I. Budnick
University of Connecticut, University of Connecticut, Storrs, CT 06269
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W.A. Hines
University of Connecticut, University of Connecticut, Storrs, CT 06269
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C. Niedermayer
Laboratory for Neutron Scattering, Paul Scherrer Institut, Paul Scherrer Institut Villigen, PSI, Switzerland
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Esen Alp
Argonne National Laboratory, Argonne, IL 60439, Argonna National Laboratory
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W. Bi
Argonne National Laboratory, Argonne, IL 60439
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D.G. Hinks
Argonne National Laboratory, Argonne, IL 60439
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D.E. Brown
Argonne National Laboratory, Argonne, IL 60439
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B.O. Wells
University of Connecticut, University of Connecticut, Storrs, CT 06269