Neutron Scattering Investigation of Itinerant Electron System Fe2P

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タイトル別名
  • Neutron Scattering Investigation of Itinerant Electron System Fe<SUB>2</SUB>P
  • Neutron Scattering Investigation of It

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説明

Neutron elastic and inelastic scattering experiments have been performed on Fe2P single crystals in the temperature range from 8 K to 800 K. Fe2P is of the hexagonal C-22 type structure and exhibits c-axis ferromagnetism below 130 K. In the intermediate range between 130 K and 217 K, the canted ferromagnetism with a uniform component along the c-axis M0 and a staggered component in the c-plane MQ appears, and the first order transition takes place at Tc=217 K from the canted ferromagnetism to paramagnetism. The most interesting behaviour is the existence of giant short range order up to T=3Tc. It originates in the small stiffness constants D and leads to the strong deviation of susceptibility from the Curie-Weiss law. The amplitude of the spin fluctuation observed In Fe2P In the pararnagnetic phase is understood by the simple model with parameters deduced from the spin wave dispersion at low temperature, the magnetization and uniform susceptibility.

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