Electrodeposition of granular FeCoNi films with large permeability for microwave applications
- 7 September 2011
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 21 (40), 16042-16048
- https://doi.org/10.1039/c1jm13398e
Abstract
A simple methodology to fabricate soft magnetic FeCoNi granular films from cheap salt solutions viaelectrodeposition at room temperature is demonstrated. With the addition of a small quantity of organic and inorganic additives into the solutions, the FeCoNi nano-granular films possess ultra-high permeability, large resistivity, and other desirable magnetic properties for gigahertz microwave applications. Typically, the films have a coercivity of less than 10 or 20 Oe along the hard or easy axis, respectively, with a saturation flux density of up to 2.43 T. The magnetic permeability and resistivity are correspondingly up to a magnitude order of about 103 and 10−4 Ω cm. These soft FeCoNi films also show a big anisotropic field of more than 50 Oe and a very small magnetostriction of −5. They can be potentially applied to microwave absorption as well as other applications.Keywords
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