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Magnetic Ordering and Structural Distortion in PrFeAsO Single Crystal Studied by Neutron and X-ray Scattering

Published

Author(s)

M. G. Kim, William D. Ratcliff, D. M. Pajerowski, J.-W. Kim, J.-Q. Yan, Jeffrey W. Lynn, A. I. Goldman, A. Kreyssig

Abstract

We report the magnetic ordering and structural distortion in PrFeAsO crystals, the basis compound for one of the oxypnictide superconductors, using high-resolution x-ray diffraction, neutron diffraction, and x-ray resonant magnetic scattering (XRMS). We found the structural tetragonal-to-orthorhombic phase transition at TS = 147 K, the AFM phase transition of the Fe moments at TFe = 72 K, and the Pr AFM phase transition at TPr = 21 K. Combined high-resolution neutron diffraction and XRMS show unambiguously that the Pr moments point parallel to the longer orthorhombic a axis and order antiferromagnetically along the a axis but ferromagnetically along the b and c directions in the stripe-like AFM order. The temperature dependent magnetic order parameter of the Pr moments shows no evidence for a reorientation of moments.
Citation
Physical Review B
Volume
103
Issue
17

Keywords

Iron Superconductors, Antiferromagnetic Order, Neutron Diffraction, X-ray diffraction, Structural Transition, PrFeASO

Citation

Kim, M. , Ratcliff, W. , Pajerowski, D. , Kim, J. , Yan, J. , Lynn, J. , Goldman, A. and Kreyssig, A. (2021), Magnetic Ordering and Structural Distortion in PrFeAsO Single Crystal Studied by Neutron and X-ray Scattering, Physical Review B (Accessed April 18, 2024)
Created May 4, 2021, Updated September 21, 2021