Percolation-like behaviour of the spin-wave stiffness in very dilute amorphous (FepNi1−p)80B18Si2 ferromagnets
作者： K. Zadro
DOI: 10.1016/S0375-9601(97)00819-0
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摘要: The thermal demagnetization of several (FepNi1−p)80B18Si2 amorphous ferromagnetic alloys has been analyzed in terms the percolation model for very dilute ferromagnets. Taking into account contributions from both long wavelength magnons and short fractons we obtained power law concentration dependence spin-wave stiffness vicinity critical pc, D(p) ∝ (p − pc)η with η = 1.37. ratio between Curie temperature, D(p)Tc(p), also shows variation p. Since corresponding exponent is positive this vanishes as p tends to pc.
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