Low Temperature(25-80.DEG.C.) Synthesis of Spinel-Type((Fe,M)3O4, M=Fe,Co,Ni, and Zn) Magnetic Films.

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  • Nishimura K.
    Department of Physical Electronics, Tokyo Institute of Technology
  • Matsushita N.
    Department of Physical Electronics, Tokyo Institute of Technology
  • Abe M.
    Department of Physical Electronics, Tokyo Institute of Technology

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Other Title
  • 低温（２５‐８０℃）フェライトめっきによるスピネル型（（Ｆｅ，Ｍ）３Ｏ４，Ｍ＝Ｆｅ，Ｃｏ，Ｎｉ，ａｎｄ　Ｚｎ）磁性膜の作製
  • 低温(25-80℃)フェライトめっきによるスピネル型((Fe,M)3O4,M=Fe,Co,Ni,and Zn)磁性膜の作製
  • テイオン 25 80ドC フェライトメッキ ニ ヨル スピネルガタ Fe M 3O4 M Fe Co Ni and Zn ジセイ マク ノ サクセイ

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Abstract

Spinel-type (Fe3-xMxO4, M=Fe, Co, Ni, and Zn) polycrystalline films were synthesized by ferrite plating at 25, 50, and 80°C from an aqueous solution of FeCl2 + MCl2 mixed with an oxidizing solution of NaNO2 + CH3COONH4 + NH3. For magnetite (Fe3O4), as the temperature was decreased from 80°C to 25°C, the pH of the reaction solution to obtain single-phase Fe3O4 increased from 6.8 to 8.4, and the maximum rate of film deposition decreased from 13.3 nm/min to 2.3 nm/min. For Fe3-xMxO4, as the temperature was decreased from 90°C to 25°C, the ratio [x in film] / [x in reaction solution] increased from M = Co and Ni, while decreasing for M = Zn. This is explained by the dependence of the adsorption rate of M ions on the pH, which changes as the temperature changes. All the films had saturation magnetizations that compared favorably with those of bulk samples.

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