SIMULTANEOUS TRANSMISSION AND SCATTERING MÖSSBAUER STUDY ON AMORPHOUS Fe₄₀Ni₄₀P₁₄B₆

Abstract
⁵⁷Fe Mössbauer spectra of Metglas 2826 (Fe₄₀Ni₄₀P₁₄B₆) were obtained simultaneously in transmission geometry by measuring γ-rays and in scattering geometry by measuring conversion electrons. From simultaneous measurements differences in bulk and surface states were clearly observed and summarized as follows : 1) Surfaces exhibit larger mean magnetic fields than the bulk. 2) Magnetic moments in surfaces are more aligned in the plane of the ribbon than the magnetic moments of the bulk. 3) After annealing at 545 K surfaces exhibit larger magnetic fields than the bulk but the degree of alignment of the magnetic moments in the plane of the ribbon is reduced.