Magnetic properties of multilayered Fe-Si films

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  • N. Kumasaka
    Central Research Laboratory of Hitachi, Ltd., Kokubunji, Tokyo 185
  • N. Saito
    Central Research Laboratory of Hitachi, Ltd., Kokubunji, Tokyo 185
  • Y. Shiroishi
    Central Research Laboratory of Hitachi, Ltd., Kokubunji, Tokyo 185
  • K. Shiiki
    Central Research Laboratory of Hitachi, Ltd., Kokubunji, Tokyo 185
  • H. Fujiwara
    Central Research Laboratory of Hitachi, Ltd., Kokubunji, Tokyo 185
  • M. Kudo
    Central Research Laboratory of Hitachi, Ltd., Kokubunji, Tokyo 185

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<jats:p>The coercivity and permeability of Fe-Si films can be improved by laminating several layers with either nonmagnetic (SiO2, Al2O3, Al or Mo) or ferromagnetic (Ni, Fe, Co or 20-wt. % Fe–Ni) spacers. It is also found that films made with soft magnetic laminations have an advantage over nonmagnetic or hard magnetic ones. Such behavior is concluded to be attributed to the smaller grain size, and pinhole or exchange coupling of multilayered Fe-Si films by observing domain and grain structures.</jats:p>

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