High Coercive Thin Films of Co-Doped γ-Fe_2O_3-Fe_3O_4 Solid Solution

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概要

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• Fe^<3+>_<1+2δ>[Fe^<2+>_<1-3δ>Δ_δ]O_4 thin films have been prepared by oxidizing sputter-deposited magnetite, where Δ and δ indicate the vacancy and its content, respectively. The coercive force, H_c, exhibited the maximum value when δ was approximately 0.20. Films with a δ of more than 0.18 had only an infinitesimal H_c increase even after 6 years of aging at room temperature. It was surmised that enhanced Fe^<2+>-Δ ordering stabilizes the H_c change with time. (Co_<0.023>Fe_<0.977>)_<2.80>Δ_<0.20>O_4 films had a 1300 Oe H_c and 0.85 squareness ratio. These films are thought to be useful for high bit density magnetic disk application.

• 社団法人応用物理学会の論文
• 1984-07-20

著者

• Terada Akira

  Ibaraki Electrical Communication Laboratory Nippon Telegraph And Telephone Public Corporation

• Ohta Satoshi

  Ibaraki Electrical Communication Laboratory Nippon Telegraph And Telephone Public Corporation

• Ishii Osamu

  Ibaraki Electrical Communication Laboratory Nippon Telegraph And Telephone Public Corporation

関連論文

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• Reactive Synthesis of Niobium Nitride by Pulse Laser Annealing
• Reactive Synthesis of Niobium Nitride by Pulse Laser Annealing
• On the Intermediate State of Dehydration of Synthetic Goethite
• High Coercive Thin Films of Co-Doped γ-Fe_2O_3-Fe_3O_4 Solid Solution
• Perpendicular Magnetic Anisotropy in γ-(Fe_Os_x)_2O_3 Thin Films

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