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A STUDY OF SPIN WAVE IN Fe3Si AT LOW TEMPERATURE

P. v. BLANCKENHAGEN TAO FANG YAN QI-WEI SHEN ZHI-GONG LIN QUAN LIN HONG

A STUDY OF SPIN WAVE IN Fe3Si AT LOW TEMPERATURE

P. v. BLANCKENHAGEN, TAO FANG, YAN QI-WEI, SHEN ZHI-GONG, LIN QUAN, LIN HONG
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  • Received Date:  25 June 1986
  • Published Online:  20 March 2005

A STUDY OF SPIN WAVE IN Fe3Si AT LOW TEMPERATURE

  • 1. (1)Kernforschungszentrum Karlsruhe,FRG; (2)中国科学院物理研究所; (3)中国原子能科学研究院

Abstract: The dispersion relation of spin wave in Fe3Si at 14 K has been measured by inelastic coherent neutron scattering. The spin wave stiffness constant D0, which is obtained experimentally from quadratic dispersion of spin wave, equals 270 meV ?2. A calculation of effective exchange integral Jeff has been done in the frame of Heisenberg model. From the temperature dependence of magnetization, a spin wave stiffness constant Dm(0) can be derived also. There is an indication of the existence of Stoner excitations from a comparison of D0 and Dm(0). The temperature dependence of spin wave stiffness constant is also gaven.

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