Effect of boron on the field-induced magnetic anisotropy in Fe-based soft magnetic nanostructures
作者： N. Ito , K. Suzuki , J. S. Garitaonandia , J. D. Cashion
DOI: 10.1063/1.3058701
关键词: Mössbauer effect 、 Nuclear magnetic resonance 、 Hyperfine structure 、 Volume fraction 、 Nanocrystalline material 、 Amorphous solid 、 Magnetic anisotropy 、 Materials science 、 Lever rule 、 Condensed matter physics 、 Ferromagnetism
摘要: The field-induced magnetic anisotropy (Ku) and the hyperfine interactions in nanocrystalline Fe94−xNb6Bx (x=10, 12, 14) alloys have been investigated with particular attention paid to origin of Ku bcc-Fe/amorphous soft nanostructures. Fe57 Mossbauer spectra from Fe–Nb–B suggest that solute content residual amorphous phase remains unchanged while volume fraction (Vam), increases linearly B content. This indicates Vam is governed by lever rule over partial equilibrium between primary bcc-Fe phases. Both saturation magnetization (Js) were confirmed vary they are well described taking into account volume-weighted average Js=2.1T Ku=127J∕m3 for nanocrystallites Js=1.0T Ku=76J∕m3 matrix. relatively large value estimated bcc may be attributed a possib...
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