Microstructure and microwave permeability of FeCo thin films with Co underlayer

Wu, Yuping; Han, Guchang; Kong, Ling Bing

doi:10.1016/j.jmmm.2010.06.032

Cited by 25 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The permeability frequency spectra from 0.1 to 4 or 7 GHz were characterized with a vector network analyzer (Agilent 5230A), using a shorted micro-strip transmission-line perturbation fixture. 30…”

Section: Methodsmentioning

confidence: 99%

Electrodeposition of granular FeCoNi films with large permeability for microwave applications

Zong

Pong²,

et al. 2011

J. Mater. Chem.

Self Cite

View full text Add to dashboard Cite

A simple methodology to fabricate soft magnetic FeCoNi granular films from cheap salt solutions via electrodeposition 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 10 3 and 10 À4 U cm. These soft FeCoNi films also show a big anisotropic field of more than 50 Oe and a very small magnetostriction of <10 À5 . They can be potentially applied to microwave absorption as well as other applications.

show abstract

Section: Methodsmentioning

confidence: 99%

Electrodeposition of granular FeCoNi films with large permeability for microwave applications

Zong

Pong²,

et al. 2011

J. Mater. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[7] Co but the precision on Co content (targeted to be 65%) was poor due to the existence of an anomalous codeposition during the electrodeposition process [1]. The low value of H c and high magnetization at saturation, together with high magnetization at remanence is very interesting in the view of developing sensors active layers or for highfrequency applications [26]. Enhancement of H c with increasing thickness is usually due to the enhanced roughness, increased number of grain boundaries and island-like morphology of the grains [27,28].…”

Section: E Magnetic Behaviormentioning

confidence: 99%

Microstructural, electrical and magnetic properties of Fe35Co65 thin films grown by thermal evaporation from mechanically alloyed powders

et al. 2014

View full text Add to dashboard Cite

We present a detailed study of the microstructural, electrical and magnetic properties of Fe 35 Co 65 thin films deposited by thermal evaporation using nanocrystalline mixture. The nanocrystalline Fe 35 Co 65 powder was prepared by mechanical alloying process using high energy ball milling and then carefully studied. Good homogeneity, purity and stoichiometry were demonstrated in the powder composed of 25 nm mean crystallite size. Microstuctural analysis of Fe 35 Co 65 thin films ranging from 9 to 50 nm deposited on Si (001) shows that the stoichiometry is conserved over the whole thickness range and that (110) texture forms as the film thickness increases. Our work finally demonstrates that high saturation magnetization, low coercivity and high electrical resistivity FeCo thin films can be achieved by thermal evaporation from properly set mechanical alloying powder.

show abstract

“…Thermodynamically, the coupling enforces the atomic structure of Co into the lowest energy configuration, commensurate with highly oriented magnetic structures (as observed here), resulting in better soft magnetic properties than in the single-layer Co-MAL. 37 Second, there is a weak exchange bias due to oxide formation along the edges of the anti-dots and/or on the respective magnetic layers. 26,38,39 This can change the overall angular dependence and result in unidirectionality, while maintaining the conditions of the uniaxial anisotropy.…”

Section: Magneto-optical Studiesmentioning

confidence: 99%

Magnetization reversal mechanism of bilayered magnetic anti-dot lattices

Deshpande

Seo

Lee

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

Articles you may be interested inModifications of magnetic anisotropy and magnetization reversal in [Co0.4 nm/Pd0.7 nm]50 multilayers induced by 10 keV-He ion bombardment Micropatterned ordered arrays of cobalt (Co) anti-dots on a uniform thin nickel (Ni) underlayer, known as bilayered magnetic anti-dot lattices (BMALs), were fabricated using photolithography and a controlled wet-etching process. The magnetization reversals in a rhomboid BMAL under the application of a field along 0 (i.e., easy axis) and 90 (i.e., hard axis) were investigated using field-dependent magnetic-force microscopy, and the angular dependence of squareness (M r /M s ) and coercivity (H c ) were studied using magneto-optical Kerr effects. Although the magnetic reversals were dominated by domain-wall motions or domain rotations, reflecting the easy and hard axis characteristics, various other complex reversal processes were also found that depends on the history of the field application. The angular dependence of M r /M s and H c in a BMAL system was completely different from that in a single-layer, Co magnetic anti-dot lattice. Interestingly, a unidirectional and uniaxial component representing the overall magnetic anisotropy was revealed in the BMAL system. The details of these complicated magnetization behaviors were investigated and elaborated.

show abstract

Microstructure and microwave permeability of FeCo thin films with Co underlayer

Cited by 25 publications

References 15 publications

Electrodeposition of granular FeCoNi films with large permeability for microwave applications

Electrodeposition of granular FeCoNi films with large permeability for microwave applications

Microstructural, electrical and magnetic properties of Fe35Co65 thin films grown by thermal evaporation from mechanically alloyed powders

Magnetization reversal mechanism of bilayered magnetic anti-dot lattices

Contact Info

Product

Resources

About