Two-dimensional spin density wave state in LaFeAsO

Ishikado, Motoyuki; Kajimoto, Ryoichi ; Shamoto, Shinichi ; Arai, Masatoshi; Iyo, Akira*; Miyazawa, Kiichi*; Shirage, P. M.*; Kito, Hijiri*; Eisaki, Hiroshi*; Kim, S.-W.*; Hosono, Hideo*; Guidi, T.*; Bewley, R.*; Bennington, S. M.*

The parent compound of Fe oxypnictide superconductor, LaFeAsO, has been studied by pulsed neutron powder inelastic scattering measurement. The inelastic scattering intensity along Q-axis at T=140 K exhibits prominent asymmetric peaks ascribed to the 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.

Language	:	English
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Meeting title	:	International Workshop on Iron Related High-Tc Superconductors (IRiSes 2009)
Held date	:	2009/01
Location (city)	:	Tokyo
Location (country)	:	Japan
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Keywords	:	no keyword
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Cooperating Institute	:	科学技術振興機構

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Registration No. : BB20083812
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