Influence of complexing agent on the electrodeposited Co–Pt–W magnetic thin films

Wei, Guoying; Ge, Hongliang; Huang, Lihong; Wu, Qiong; Wang, Xinqing; Huang, Liming

doi:10.1016/j.apsusc.2007.11.038

Cited by 13 publications

(2 citation statements)

References 8 publications

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“…Since the pH of the baths employed to produce the particles shown in Figure a and b are different, (4.4 in Figure a and 3.1 Figure b), the change in texture might be caused by the adsorption of hydrogen and hydrogen evolution processes. − It could also be a consequence of adsorption of carboxylate groups of AA onto the crystal surface, since semihydrophilic molecules modify the shape of electrodeposits because they preferentially adsorb onto certain crystal facets, thereby controlling the growth rates along different crystal axes. ,− To distinguish between these two processes, a solution containing 0.1 M acetic acid-acetate buffer (pH = 4.4) was employed to prepare microparticles. Hemispherical particles are obtained in either AA or AA/acetate buffer baths, and little influence of pH is observed.…”

Section: Resultsmentioning

confidence: 99%

Electrosynthesis of Iron, Cobalt, and Zinc Microcrystals and Magnetic Enhancement of the Oxygen Reduction Reaction

et al. 2012

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Sparse metallic crystals of iron, cobalt, and zinc are produced by electrodeposition on polyaniline (PANI) coated gold electrodes. The crystal habit is determined by the composition of the electrolyte. Thin hexagonal crystallites of cobalt or zinc can grow with the basal plane parallel to the substrate, but acetic acid strongly affects the growth of the cobalt deposits, as it changes the crystal habit from hexagonal to hemispherical. Iron is electrodeposited on PANI in the form of submicrometer cubes in the presence of acetic acid, while in its absence micrometer-size hemispheres are produced. The magnetization curves for Fe and Co are correlated with the observed textures. Sparse heterogeneously structured surfaces with ∼2 μm hemispherical metal grains of the three metals were then used as electrodes to investigate the magnetic field effect on the oxygen reduction reaction. For zinc, the effect of a 360 mT applied magnetic field was a slight increase (3%) in the maximum oxygen reduction current, which is attributed to magnetohydrodynamic (MHD) flows produced by the interaction of the external magnetic field and the current distribution near the surface of the grains via the Lorentz force. Significantly larger increases, ∼12% and ∼8% for iron and cobalt, respectively, are attributed to enhanced convection in the vicinity of the ferromagnetic grains due to the magnetic field gradient force.

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Section: Resultsmentioning

confidence: 99%

Electrosynthesis of Iron, Cobalt, and Zinc Microcrystals and Magnetic Enhancement of the Oxygen Reduction Reaction

et al. 2012

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“…[4][5][6][7] Many different ferromagnetic metals, like Co, Fe, Ni, and their alloys are used in magnetic actuators. [8][9][10][11][12] In order to be a good magnet, the plated metal should have high coercivity and contain high magnetic energy, while good retentivity properties are demanded in membranes. 13,14 Since metallic films are less elastic than polymeric ones, the major challenge in this research field is obtaining thin films with good magnetic properties and adherence, not affecting the membrane flexibility.…”

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confidence: 99%

Electroplated Nickel Permanent Magnetic Films over Polymeric Membranes

Campos

Flacker

Vaz

et al. 2011

J. Electrochem. Soc.

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The influence of a magnetic field on electrodeposition of nickel films over polymeric substrates, which renders flexible membranes with a permanent magnet layer, has been studied. Samples of membranes with nickel deposited by electroplating in presence and absence of magnetic field are compared. The electroplated layer is deposited over an electroless contact layer, after a wet pre-treatment to improve adherence. Mechanical and magnetic properties of the samples were measured as function of process parameters. Experimental results confirm that the magnetic field has a positive impact over properties of deposited films. Pre-treatment using different process times influences uniformity and adherence of the deposited films. Results show also that films electroplated in presence of magnetic field outperformed those deposited in its absence, with enhanced maximum energy product and reduced surface roughness. On the other hand, films electroplated in presence of magnetic field tend to be less resistant to fracture during flexure tests.Nucleation.-The seed layer is obtained by sensitizing the polymer with an acid stannous chloride solution (1 g/l), then activating it with palladium chloride solution (0.25 g/l). The stannous ions (Sn 2þ ) absorbed on the surface reduce the palladium ions (Pd 2þ ), by the reaction (1). The palladium metal atoms form clusters and the seed layer which catalyzes the electroless nickel deposition. 35,36 z

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Soft Magnetic Characteristics and Magnetoimpedance Phenomenon in Copper Wire Coated with Permalloy Film Electroplated from a Sodium Gluconate-Based Bath

Tandon,

Kotti,

Mishra

et al. 2024

J. Electron. Mater.

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Influence of complexing agent on the electrodeposited Co–Pt–W magnetic thin films

Cited by 13 publications

References 8 publications

Electrosynthesis of Iron, Cobalt, and Zinc Microcrystals and Magnetic Enhancement of the Oxygen Reduction Reaction

Electrosynthesis of Iron, Cobalt, and Zinc Microcrystals and Magnetic Enhancement of the Oxygen Reduction Reaction

Electroplated Nickel Permanent Magnetic Films over Polymeric Membranes

Soft Magnetic Characteristics and Magnetoimpedance Phenomenon in Copper Wire Coated with Permalloy Film Electroplated from a Sodium Gluconate-Based Bath

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