Absence of magnetic fluctuation on LaFePO $_{0.9}$

Ishikado, Motoyuki; Kodama, Katsuaki ; Kajimoto, Ryoichi ; Nakamura, Mitsutaka ; Inamura, Yasuhiro; Mizuno, Fumio; Wakimoto, Shuichi ; Iyo, Akira*; Eisaki, Hiroshi*; Arai, Masatoshi; Shamoto, Shinichi

We have performed inelastic neutron scattering on 34g powder sample of iron-based superconductor LaFePO $_{0.9}$ with superconducting transition temperature () = 5 K. According to the experimental results, we did not observe magnetic fluctuation arising from -M Fermi Surface nesting. This is similar feature with the results of electron-overdoped LaFeAs(O,F) F=20% whose is heavily suppressed (7 K), and this means strong correlation with relatively high- and magnetic fluctuation arising from -M nesting. In the session, we discuss the reason why magnetic fluctuation disappears in this system.

Language	:	Japanese
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Meeting title	:	日本物理学会第66回年次大会
Held date	:	2011/03
Location (city)	:	新潟
Location (country)	:	日本
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Cooperating Institute	:	科学技術振興機構

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Registration No. : BB20103635
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