Electrochemical Aspects of Thin‐Film Storage Media

Brusić, V.; Horkans, Jean; Barclay, Donald J.

doi:10.1002/9783527616756.ch6

Cited by 9 publications

(4 citation statements)

References 109 publications

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“…A deeper understanding of the deposition reaction should be necessary to achieve precise control of microstructural and functional properties of the deposited films. − The reaction mechanism has been investigated mainly from electrochemical approaches and kinetic viewpoints. − An ab initio molecular orbital (MO) method has the capability of providing a mechanistic understanding for the deposition process at an elementary reaction level, which cannot be achieved by the conventional electrochemical approaches. From these points, we focus on the reductants and the catalysts in the electroless deposition process and explore these mechanisms by the ab initio MO method.…”

Section: Introductionmentioning

confidence: 99%

Ab Initio Molecular Orbital Study on the Oxidation Mechanism for Dimethylamine Borane as a Reductant for an Electroless Deposition Process

et al. 1999

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The oxidation mechanism of dimethylamine borane (DMAB) as a reductant for an electroless deposition process was studied by an ab initio molecular orbital method. Two types of reaction pathways, via either three-coordinate borane molecules obtained by primary dehydrogenation reactions, or five-coordinate ones by primary additions of OH- for the oxidation of the DMAB, were examined. While the former pathway corresponds to the general oxidation mechanism of the reductant proposed by Meerakker, the present theoretical results support the latter one. Furthermore, it was clarified that an electron emission occurs when OH- adds to the four-coordinate compounds, which agrees with the Meerakker's mechanism. Results of the normal-mode analyses showed that the five-coordinate compounds are the transition states. The optimized geometries of monoanion five-coordinate molecules are nearly bipyramidal. The charge and spin-population analyses indicated that the axial bondings in the five-coordinate compounds are stabilized by the three-center three- or four-electron bondings. During the oxidation reaction of the DMAB, the change in the net charge of B is much smaller than that in the formal oxidation number, which is due to a great covalence. The existences of the five-coordinate borane molecules, which are first clarified by the present study, could be the key points of the catalytic activities of the deposited metals.

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Section: Introductionmentioning

confidence: 99%

Ab Initio Molecular Orbital Study on the Oxidation Mechanism for Dimethylamine Borane as a Reductant for an Electroless Deposition Process

et al. 1999

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“…Coercivities were above 2 kOe and could be maintained up to a thickness of 10 mm [89]. Additions of Mn to these alloys have been found to promote perpendicular anisotropy; both CoMnP and CoNiMnP (P $ 3%) exhibit high remanence in the perpendicular direction; coercivity was about 1.6 kOe for Co-Mn-P, well above 2 kOe for Co-Ni-Mn-P [90,91].…”

Section: Electrodeposition Of Magnetic Materials For Memsmentioning

confidence: 96%

Microelectromechanical Systems

Zangari

2010

Modern Electroplating

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“…Since the discovery of the chemical deposition of NiP alloys from hipophosphite containing baths made by Brenner [1], the so called electroless deposition process has been intensely studied because it shows interesting characteristics like high aspect ratio deposition, low power consumption and the possibility of deposition on non-conducting surfaces. In the case of the deposition of magnetic materials, the electroless deposition of NiP buffer layers and high coercivity CoP and CoNiP magnetic alloys for data storage media [1] are examples of the succesful use of such technique for metal deposition.…”

Section: Introductionmentioning

confidence: 99%

Electroless Deposition of Thin-Film CoB alloys: The Influence of Some Bath Parameters on its Magnetic Behavior

Ribeiro

Sumodjo

2007

ECS Trans.

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The influence of citrate and glycine at different concentrations on the morphology and magnetic properties of thin film CoB alloys is studied. With both additives, coercivity (Hc) is inversely proportional to the complexant concentration. In deposits obtained from glycine containing baths higher magnetization saturation (Ms) values were obtained (1.3 T). Possibly the higher Ms in deposits grown from glycine baths is due to the low boron content (less than 1%). In deposits obtained in citrate containing baths, the boron content increased until a maximum of c.a. 15 % as the citrate concentration was increased. There are evidences that not only boron but the additive influences microstructure and therefore the magnetic properties of such films.

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Electrochemical Aspects of Thin‐Film Storage Media

Cited by 9 publications

References 109 publications

Ab Initio Molecular Orbital Study on the Oxidation Mechanism for Dimethylamine Borane as a Reductant for an Electroless Deposition Process

Ab Initio Molecular Orbital Study on the Oxidation Mechanism for Dimethylamine Borane as a Reductant for an Electroless Deposition Process

Microelectromechanical Systems

Electroless Deposition of Thin-Film CoB alloys: The Influence of Some Bath Parameters on its Magnetic Behavior

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