Open AccessMagnetic ordering and structural distortion in a PrFeAsO single crystal studied by neutron and x-ray scattering
Author(s) -
M. G. Kim,
William Ratcliff,
Daniel M. Pajerowski,
J.-W. Kim,
Jiaqiang Yan,
J. W. Lynn,
A. I. Goldman,
A. Kreyßig
Publication year - 2021
Publication title -
physical review. b./physical review. b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.78
H-Index - 465
eISSN - 2469-9969
pISSN - 2469-9950
DOI - 10.1103/physrevb.103.174405
Subject(s) - neutron diffraction , orthorhombic crystal system , condensed matter physics , tetragonal crystal system , materials science , magnetic moment , diffraction , scattering , neutron scattering , crystallography , crystal structure , physics , optics , chemistry
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 find 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 stripelike AFM order. The temperature-dependent magnetic order parameter of the Pr moments shows no evidence for a reorientation of moments.