Preparation of soft magnetic FeCo-based films for writers
- Research Institute of Magnetic Materials, Lanzhou University, Lanzhou, Gansu 730000 (China)
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou, Gansu 730000 (China)
- Lab of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)
New soft magnetic head materials, the nanocrystalline FeCoAlOC thin films, were prepared by introducing C element in epoxy resin during rf sputtering of FeCoAlO films. When Al{sub 2}O{sub 3} was cosputtered with FeCo, soft magnetic properties of thin films were highly improved: the coercive force decreases from dozen of oersted to several oersted (H{sub ch}{approx}4.8 Oe and H{sub ce}{approx}6.5 Oe). With further addition of carbon, the thin films exhibit excellent soft magnetic properties and good high frequency response: the coercivity is as low as 1.0 Oe, with saturation B{sub s}>20 kG, permeability {mu}{sup '}>500 when f{<=}1.0 GHz, and cutoff frequency around 1.7 GHz. The measurement of microstructure shows that the good magnetic properties are correlated with the small gain size of film.
- OSTI ID:
- 21190148
- Journal Information:
- Journal of Applied Physics, Vol. 105, Issue 7; Conference: 53. annual conference on magnetism and magnetic materials, Austin, TX (United States), 10-14 Nov 2008; Other Information: DOI: 10.1063/1.3078008; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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