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Haga, Yoshinori; Sakai, Hironori; Matsuda, Tatsuma
no journal, ,
Wakimoto, Shuichi; Ishikado, Motoyuki; Kodama, Katsuaki; Shamoto, Shinichi; Matsuda, Masaaki; Kajimoto, Ryoichi; Iyo, Akira*; Kito, Hijiri*; Eisaki, Hiroshi*; Arai, Masatoshi; et al.
no journal, ,
Ishikado, Motoyuki; Kajimoto, Ryoichi; Shamoto, Shinichi; Arai, Masatoshi; Iyo, Akira*; Miyazawa, Kiichi*; Shirage, P. M.*; Kito, Hijiri*; Eisaki, Hiroshi*; Kim, S.-W.*; et al.
no journal, ,
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.