Electrodeposited Fe-Co films prepared from a citric-acid-based plating bath

Yanai, Takeshi; Uto, Hiroshi; Shimokawa, Takaya; Nakano, Masaki; Fukunaga, H.; Suzuki, Kiyonori

doi:10.3938/jkps.62.1966

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…In order to confirm the reasons, we carried out an XRD analysis for the electroplated films. Figure 4 shows 3 Ni 90 film, a diffraction peak of the Cu substrate were observed. We employed the Cu-Kα radiation for the XRD analysis, and the X-ray mass absorption coefficient of Ni for the Cu-Kα radiation (48.8 cm 2 /g) is much lower than those for Fe (302 cm 2 /g) and Co (321 cm 2 /g), indicating that a penetration depth of the X-ray in Ni is larger than those for Fe and Co.…”

Section: Resultsmentioning

confidence: 98%

“…Taking into account of industrial advantages for the electroplating methods, we have studies some electroplated magnetic-films, such as Fe-Ni, Fe-Ni-Co and Fe-Pt, prepared from aqueous solutions, and reported their magnetic properties. [1][2][3][4] Deep eutectic solvents (DESs) are expected as new solution for plating bath due to their excellent industrial advantages. [5][6][7][8] We have reported Fe, Fe-Ni and Fe-Co films prepared in DES-based plating baths, and confirmed high current efficiency of the plating process.…”

Section: Introductionmentioning

confidence: 99%

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Electroplated Fe-Co-Ni films prepared from deep-eutectic-solvent-based plating baths

et al. 2016

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We fabricated soft magnetic films from DES-based plating baths, and investigated magnetic properties of the plated films. The plating baths were obtained by stirring the mixture of choline chloride, ethylene glycol, FeCl2 ⋅ 4H2O, NiCl2 ⋅ 6H2O and CoCl2 ⋅ 6H2O. The composition of the electroplated film depended on the amount of the reagent in the plating bath, and we consequently obtained the films with various composition. The current efficiency of the plating process shows high values (> 88 %) in the wide composition range. The soft magnetic films with low coercivity were obtained at the Fe compositions of ≈ 30 at.% and > 80 at.%, and we found that low coercivity could be realized by the control of the film composition. We also found that the Fe-rich films prepared from DES-based plating bath have some advantages as a soft magnetic phase for a nanocomposite magnet due to their high saturation magnetization and very fine crystal structure.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Electroplated Fe-Co-Ni films prepared from deep-eutectic-solvent-based plating baths

et al. 2016

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“…37,45 Besides for hydrogen-annealed¯lms, the saturation magnetization of reached 780 emu cm À3 and the coercivity became very small, exhibiting the typical magnetic behavior of soft magnetic alloy, therefore suitable for use in storage device applications like perpendicular magnetic recording heads and magnetic sensors. 46,47 Furthermore, the remanence to saturation magnetization ratio (M r /M s ) (i.e. magnetic squareness ratio (SQR)) is smaller than 0.5 for all samples.…”

Section: Magnetic Propertiesmentioning

confidence: 95%

STRUCTURAL, MORPHOLOGICAL, ELECTRICAL AND MAGNETIC PROPERTIES OF NANOSTRUCTUREDCoFeTHIN FILMS PREPARED BY SPRAY PYROLYSIS DEPOSITION METHOD

2015

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Nanostructured CoFe thin¯lms were prepared on the glass substrates by spray pyrolysis deposition (SPD) method. The as-deposited¯lms were separately annealed at 500 C in ambient air and hydrogen atmospheres to investigate the e®ect of annealing atmosphere on di®erent properties of the deposited¯lms. Structural, morphological, magnetic and electrical properties of annealed thin lms were investigated by the X-ray di®ractometer (XRD), scanning electron microscope (SEM), vibrating sample magnetometer (VSM) and four-point probe measurements, respectively. XRD patterns show that by changing the annealing atmosphere from ambient air to hydrogen, the crystal structure transformed from cubic spinel phase (Fd-3m) to cubic CsCl-type phase (Pm-3m). SEM images demonstrated that the morphology, grain size and thickness of annealed thin¯lms depend greatly on the atmosphere type. Thickness of the¯lms annealed in ambient air and hydrogen atmosphere were 378 and 356 nm, respectively. The morphology of the¯lms changes from small sized granular for the ambient air-annealed¯lms to coral-like structures for the hydrogen atmosphere annealed¯lms. The magnetic properties of the annealed thin¯lms depend on the annealing atmosphere, the applied¯eld directions and¯lm microstructural properties. Hydrogen annealing induced a perpendicular magnetic anisotropy in CoFe thin¯lms. Room temperature hysteresis measurements show soft magnetic behavior of the hydrogen atmosphere annealed CoFe¯lms in the perpendicular direction suggested its application in perpendicular magnetic recording media.

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“…[1][2][3][4][5][6][7] Although the aqueous solution is one of commonly used for plating baths, a water reduction prevents us from plating some metals which have standard potentials less negative than the potential of water reduction. Although it is well-known that Fe-based magnetic alloys, such as Fe-Ni, Fe-Al-Si, Fe-Pt, and Nd-Fe-B, show good magnetic properties, some metals such as Al and Nd are difficult to obtain from aqueous solutions plating baths.…”

Section: Introductionmentioning

confidence: 99%

Electroplated Fe films prepared from a deep eutectic solvent

Yanai

Shiraishi

Shimokawa

et al. 2014

Journal of Applied Physics

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Electroplating of Fe films was carried out from choline chloride-ethylene glycol types of DES (Deep Eutectic Solvent). We investigated magnetic properties of the plated Fe films and evaluated the productivity for the electroplating process. Consequently, we found that surface morphology and current efficiency of the plated films were affected by the bath temperature. We obtained the Fe films with relatively smooth surface and high current efficiency in the bath temperature range from 70 to 110 C. The deposition rate for our process depended on the current density, and we obtained high deposition rate value of approximately 120 lm/h. We also obtained high current efficiency values of approximately 90% in the wide range of plating time. These results indicate that the DES-based bath has industrial advantages for mass-producing Fe films. Therefore, we conclude that the DES-based bath is an attractive plating bath for Fe films. V C 2014 AIP Publishing LLC.

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Electrodeposited Fe-Co films prepared from a citric-acid-based plating bath

Cited by 8 publications

References 10 publications

Electroplated Fe-Co-Ni films prepared from deep-eutectic-solvent-based plating baths

Electroplated Fe-Co-Ni films prepared from deep-eutectic-solvent-based plating baths

STRUCTURAL, MORPHOLOGICAL, ELECTRICAL AND MAGNETIC PROPERTIES OF NANOSTRUCTUREDCoFeTHIN FILMS PREPARED BY SPRAY PYROLYSIS DEPOSITION METHOD

Electroplated Fe films prepared from a deep eutectic solvent

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