Electrodeposition of Binary Iron‐Group Alloys

Sasaki, Keith Y.; Talbot, Jan B.

doi:10.1149/1.2048534

Cited by 93 publications

(73 citation statements)

References 1 publication

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“…The (111) diffraction peaks were very broad, indicating small grain sizes. The nearly continuous diffraction rings in the transmission electron microscopy selected area diffraction patterns presented for a multilayer with nominal thicknesses Fe 17 Co 83 (4 nm)/Cu(4 nm) revealed also a polycrystalline fine-grained character with very low texture. As to the crystal structure, the observed diffraction rings indicated the presence of fcc-Cu, fcc-Co and hcp-Co phases.…”

Section: Comparison Of Gmr Behavior With Previously Investigated Ed Fmentioning

confidence: 92%

Preparation, Structure and Giant Magnetoresistance of Electrodeposited Fe-Co/Cu Multilayers

Tóth

Péter

Pogány

et al. 2014

J. Electrochem. Soc.

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No systematic studies have been carried out on the giant magnetoresistance (GMR) of electrodeposited (ED) Fe-Co/Cu multilayers since the elaboration of a method for the optimization of the Cu layer deposition potential. In this paper, we present results on the electrochemical optimization of the Cu layer deposition potential which was found to depend on the relative iron concentration in the bath. An X-ray diffraction study of ED Fe 5 Co 95 (1.5 nm)/Cu(d Cu ) multilayers with d Cu ranging from 0.8 nm to 10 nm revealed an fcc structure. For most of the multilayers, weak superlattice satellite reflections could be identified. The room-temperature magnetoresistance was studied in detail as a function of the individual layer thicknesses. Multilayers with Cu layer thicknesses above about 1.5 nm were found to exhibit a GMR behavior with a maximum GMR of about 5% and a typical saturation field of 1 kOe. The GMR magnitude decreased with increasing Fe-content in the magnetic layer. The spacer layer thickness evolution of the MR data was established in detail after separating the ferromagnetic and superparamagnetic GMR contributions and no oscillatory GMR was found. A comparison with literature data on both physically deposited and ED Fe-Co/Cu multilayers is also made. Since bulk Fe-Co alloys have good soft magnetic properties, 1 multilayers with this kind of alloy as the magnetic layer can have favorably low coercivity. A detailed giant magnetoresistance study (GMR) study of sputtered TM/Cu multilayers by using binary and ternary alloys of Fe, Co and Ni as magnetic layers has been carried out by Miyazaki et al.2 who also mapped out the anisotropic magnetoresistance (AMR) of bulk alloys of the Fe-Co-Ni system. As to the GMR of physically deposited Fe-Co/Cu multilayers, it was shown that they can, indeed, have a significant room-temperature GMR (Refs. 2 and 3) with fairly low saturation fields. 3Inomata and Saito 3 investigated sputtered Fe-Co/Cu multilayers with Fe-concentrations of 10, 20 and 50%. In their study, the Cu layer thickness was varied between 0.9 and 3.8 nm and three oscillatory GMR peaks were found as a function of the spacer layer thickness. Rafaja et al. 4 found about 25% GMR on sputtered [Fe 10 Co 90 (1.1 nm)/Cu(2.2 nm)]x20 multilayers but a detailed study on the influence of the individual layer thicknesses was not carried out. Gangopadhyay et al.5 also studied sputtered Fe 10 Co 90 /Cu multilayers. The Cu layer thickness was varied between 0.5 and 3.1 nm and an oscillatory GMR was found, but contrary to the typical result on sputtered multilayers, the second peak was found to be the larger.There are contradictory experimental data in the literature on physically deposited FM/Cu multilayers, whether a pure Co magnetic layer or a Fe-Co alloy shows larger GMR value. Kataoka et al. 6 and Inomata and Saito 3 present data according to which for [Fe 20 Co 80 (1.0 nm)/Cu(1.0 nm)]x15 multilayers the GMR is higher than for multilayers with pure Co as magnetic layer, while the work of Miyazaki et al. 7 shows that...

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Section: Comparison Of Gmr Behavior With Previously Investigated Ed Fmentioning

confidence: 92%

Preparation, Structure and Giant Magnetoresistance of Electrodeposited Fe-Co/Cu Multilayers

Tóth

Péter

Pogány

et al. 2014

J. Electrochem. Soc.

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“…[4][5][6][7][8][9][10][11][12][13] Since the magnetic properties of FeNi alloy change greatly depending on its composition, the alloy of fixed composition should be deposited stably to keep the desired properties. Therefore, it is important to make clear the mechanism of anomalous deposition of Fe-Ni alloys.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Anomalous Type Electrodeposition of Fe-Ni Alloys from Sulfate Solutions

et al. 2004

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The electrodeposition of Fe-Ni alloys was performed galvanostatically in the sulfate solutions of pH 1-3 at 40 C and the alloy deposition behavior was compared with that of Zn-iron-group metal alloys to investigate their codeposition mechanism. The deposition behavior of Fe-Ni alloy showed a typical feature of the anomalous codeposition, in which electrochemically less noble Fe deposits preferentially under most plating conditions. The anomalous codeposition behavior in Fe-Ni alloy deposition was evidently dependent on the pH buffer capacity of the solutions. This can be explained in terms of the preferential adsorption of FeOH on the deposition sites of more noble Ni due to the extremely smaller dissociation constant of FeOH þ than NiOH þ in the multi-step reduction process of hydrated iron-group metal ions.

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“…4. This term, introduced by Brenner (Activities of the PFM on permalloy thin films deposition and magnetic devices 2000; Matlosz 1993;Sasaki and Talbot 1995), describes the preferential deposition of the less noble metal, Fe, to the more noble metal, Ni. The Fe content for the DC deposition reached a maximum then decreased with increasing average current density.…”

Section: Experimental Results and Analysis Of Nickel: Ironmentioning

confidence: 99%

Fabrication process of a micro-inductor utilising a magnetic thin film core

et al. 2006

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Thin film magnetic alloys incorporated into microscale magnetic components are investigated as a potential solution to the increased power density required in power supplies of fast switching frequencies.The performances of direct current and Pulse Reverse (PR) electrodeposited permalloy and Vitrovac 6025 are assessed through their inclusion within a solenoid microinductor. A design of experiment (DOE) determined the optimum waveform for (PR) deposition within a sulphate electrolyte. The effects of air-gaps on core performance are also investigated. The fabricated inductors have an inductance ranging from 0.12 to 118 lH.

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Electrodeposition of Binary Iron‐Group Alloys

Cited by 93 publications

References 1 publication

Preparation, Structure and Giant Magnetoresistance of Electrodeposited Fe-Co/Cu Multilayers

Preparation, Structure and Giant Magnetoresistance of Electrodeposited Fe-Co/Cu Multilayers

Mechanism of Anomalous Type Electrodeposition of Fe-Ni Alloys from Sulfate Solutions

Fabrication process of a micro-inductor utilising a magnetic thin film core

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