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

Published

May 5, 2021

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 T_S = 147 K, the AFM phase transition of the Fe moments at T_Fe = 72 K, and the Pr AFM phase transition at T_Pr = 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

Pub Type

Journals

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 May 10, 2024)