Inelastic neutron scattering study of low-energy spin excitations on LaFeAsO $_{1-x}$ F $_{x}$ system

Shamoto, Shinichi ; Ishikado, Motoyuki*; Wakimoto, Shuichi ; Kodama, Katsuaki ; Kajimoto, Ryoichi* ; Arai, Masatoshi

Low-energy spin excitations on polycrystalline LaFeAsO $_{1-x}$ F $_{x}$ samples have been studied by inelastic neutron scattering. The dynamical spin susceptibility "() of the superconducting (SC) samples is found to be comparable to that of the magnetically ordered parent sample. On the other hand, "() almost vanishes at x=0.158, where the SC transition temperature T $_{c}$ is suppressed to 7 K. This result suggests that the low energy spin excitations are closely connected with high-T $_{c}$ superconductivity.

Language	:	English
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Meeting title	:	1st Asia-Oceania Conference on Neutron Scattering (1st AOCNS)
Held date	:	2011/11
Location (city)	:	Tsukuba
Location (country)	:	Japan
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Cooperating Institute	:	JST-TRiP

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Registration No. : BB20112468
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Inelastic neutron scattering study of low-energy spin excitations on LaFeAsOF system

Inelastic neutron scattering study of low-energy spin excitations on LaFeAsO $_{1-x}$ F $_{x}$ system