TY - JOUR
T1 - Two-dimensional spin density wave state in LaFeAsO
AU - Ishtkado, Motoyuki
AU - Kajtmoto, Ryoichi
AU - Shamoto, Shin Ichi
AU - Arai, Masatoshi
AU - Iyo, Akira
AU - Miyazawa, Kiichi
AU - Shirage, Parasharam M.
AU - Kito, Hijiri
AU - Eisaki, Hiroshi
AU - Kim, Sungwng
AU - Hosono, Hideo
AU - Guidi, Tatiana
AU - Bewley, Robert
AU - Bennington, Stephen M.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2009/4
Y1 - 2009/4
N2 - The parent compound of the Fe oxypnictide superconductor, LaFeAsO, has been studied by pulsed neutron powder inelastic scattering measurement. The inelastic scattering intensity along the Q-axis at T = 140K exhibits a prominent asymmetric peak ascribed to the (π, π, I) magnetic rod, suggesting the two-dimensionality of the spin density wave above the magnetic transition temperature. It persists even in the tetragonal phase up to room temperature, which is well above the magnetic transition temperature, corresponding to two antiferromagnetic sublattices or domains with a strong effective antiferromagnetic interaction J 2 between next-nearest-neighbour Fe magnetic moments in a single Fe square lattice.
AB - The parent compound of the Fe oxypnictide superconductor, LaFeAsO, has been studied by pulsed neutron powder inelastic scattering measurement. The inelastic scattering intensity along the Q-axis at T = 140K exhibits a prominent asymmetric peak ascribed to the (π, π, I) magnetic rod, suggesting the two-dimensionality of the spin density wave above the magnetic transition temperature. It persists even in the tetragonal phase up to room temperature, which is well above the magnetic transition temperature, corresponding to two antiferromagnetic sublattices or domains with a strong effective antiferromagnetic interaction J 2 between next-nearest-neighbour Fe magnetic moments in a single Fe square lattice.
UR - https://www.scopus.com/pages/publications/67649229314
UR - https://www.scopus.com/pages/publications/67649229314#tab=citedBy
U2 - 10.1143/JPSJ.78.043705
DO - 10.1143/JPSJ.78.043705
M3 - Article
AN - SCOPUS:67649229314
SN - 0031-9015
VL - 78
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 4
M1 - 043705
ER -