Two-Dimensional Spin Density Wave State in LaFeAsO
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概要
- 論文の詳細を見る
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 $T=140$ K exhibits a prominent asymmetric peak ascribed to the $(\pi,\pi,\ell)$ 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.
- 2009-04-15
著者
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ISHIKADO Motoyuki
Japan Atomic Energy Agency
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KAJIMOTO Ryoichi
Japan Atomic Energy Agency
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SHAMOTO Shin-ichi
Japan Atomic Energy Agency
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ARAI Masatoshi
Japan Atomic Energy Agency
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IYO Akira
JST, TRIP
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MIYAZAWA Kiichi
JST, TRIP
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SHIRAGE Parasharam
JST, TRIP
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EISAKI Hiroshi
JST, TRIP
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KIM SungWng
Tokyo Institute of Technology
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Hosono Hideo
Tokyo Inst. Technol. Yokohama
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Guidi Tatiana
Isis Facility Rutherford Appleton Laboratory
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Bewley Robert
Isis Facility Rutherford Appleton Laboratory
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Bennington Stephen
Isis Facility Rutherford Appleton Laboratory
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Miyazawa Kiichi
JST, TRIP, Chiyoda, Tokyo 102-0075
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Kito Hijiri
JST, TRIP, Chiyoda, Tokyo 102-0075
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Kito Hijiri
JST, Transformative Research-Project on Iron Pnictides (TRIP), Tokyo 102-0075, Japan
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Arai Masatoshi
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195
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Kajimoto Ryoichi
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195
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Ishikado Motoyuki
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195
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Iyo Akira
JST, TRIP, Chiyoda, Tokyo 102-0075
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Iyo Akira
JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075
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Shirage Parasharam
JST, TRIP, Chiyoda, Tokyo 102-0075
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Bewley Robert
ISIS facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire, U.K.
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Eisaki Hiroshi
JST, TRIP, Chiyoda, Tokyo 102-0075
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Eisaki Hiroshi
JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan
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Eisaki Hiroshi
JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075
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Bennington Stephen
ISIS facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire, U.K.
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Shamoto Shin-ichi
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195
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Hosono Hideo
Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503
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