Magnetic Properties of Chemical Vapour Deposited Cobalt Doped Gamma Iron Oxide Thin Films

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概要

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• Magnetic properties of chemical vapour deposited (CVD) Fe_3O_4 and γ-Fe_2O_3 obtained by co-pyrolysis of ferric and cobaltus acetyl acetonate complexes are described. Saturation magnetization, remanent magnetization and coercivity value of 3.7 kG, 2.2 kG and 820 Oe respectively have been obtained for Co-γ Fe_2O_3 films. Chemically vapour deposited Co-Fe_3O_4 films are laterally inhomogeneous with only a fraction of Co^<2+> ions at octahedral sites (B sites) of spinnel ferrite and excess Co^<2+> ions distributed in the interstitial matrix. Oxidation conversion to γ-Fe_2O_3 phase at temperatures above 35O℃ lead to Co^<2+> ion diffusion to B sites with activation energy of 0.27 eV. Consequent increase in magneto-crystalline anisotropy results in considerable enhancement in coercivity.

• 社団法人応用物理学会の論文
• 1992-12-15

著者

• Dhara Sandip

  Division Of Materials National Physical Laboratory

• Das Bijoy

  Division Of Materials National Physical Laboratory

• KOTNALA Ravinder

  Division of Materials, National Physical Laboratory

• RASTOGI Alok

  Division of Materials, National Physical Laboratory

• Rastogi Alok

  Division Of Materials National Physical Laboratory

• Kotnala Ravinder

  Division Of Materials National Physical Laboratory

関連論文

• Magnetic Properties of Chemical Vapour Deposited Cobalt Doped Gamma Iron Oxide Thin Films

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