Two-dimensional spin density wave state in LaFeAsO

Motoyuki Ishtkado; Ryoichi Kajtmoto; Shin Ichi Shamoto; Masatoshi Arai; Akira Iyo; Kiichi Miyazawa; Parasharam M. Shirage; Hijiri Kito; Hiroshi Eisaki; Sungwng Kim; Hideo Hosono; Tatiana Guidi; Robert Bewley; Stephen M. Bennington

doi:10.1143/JPSJ.78.043705

Two-dimensional spin density wave state in LaFeAsO

Motoyuki Ishtkado
, Ryoichi Kajtmoto
, Shin Ichi Shamoto
, Masatoshi Arai
, Akira Iyo
, Kiichi Miyazawa
, Parasharam M. Shirage
, Hijiri Kito
, Hiroshi Eisaki
, Sungwng Kim
, Hideo Hosono
, Tatiana Guidi
, Robert Bewley
, Stephen M. Bennington

Department of Physics

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

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.

Original language	English
Article number	043705
Journal	Journal of the Physical Society of Japan
Volume	78
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.78.043705
Publication status	Published - 2009 Apr

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1143/JPSJ.78.043705

Cite this

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title = "Two-dimensional spin density wave state in LaFeAsO",

abstract = "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.",

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doi = "10.1143/JPSJ.78.043705",

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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.

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.

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 4

M1 - 043705

ER -

Two-dimensional spin density wave state in LaFeAsO

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