集束イオンビーム法と電子線ホログラフィーを用いたFe-Co-Cu-Nb-Si-Bナノ結晶磁性材料の磁区構造評価

概要

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Magnetic domain structures of Fe-Co-Cu-Nb-Si-B alloys, in which the uniaxial anisotropy is induced by the magnetic annealing, were investigated by Lorentz microscopy and electron holography. While the specimen prepared by the ion-milling showed a rather complicated magnetic domain structure due to the drastic change in specimen thickness, the specimen prepared by the focused ion beam method, which had a uniform thickness, showed a characteristic domain structure induced by the magnetic anisotropy. The magnetic domain width in Fe_<18.8>Co_<60>Cu_<0.6>Nb_<2.6>Si_9B_9 was smaller than that in Fe_<78.8>Cu_<0.6>Nb_<2.6>Si_9B_9, and this result was reasonably explained by the magnitude of the magnetic anisotropy. The magnetic flux density (1.6 T) measured by holography for Fe_<78.8>Cu_<0.6>Nb_<2.6>Si_9B_9 was consistent with that observed for a bulk specimen (1.5 T).focused ion beam methodelectron holographythe lines of magnetic fluxmagnetization distribution
東北大学の論文
2004-03-03