Magnetic properties and corrosion-resistance of sputtered Co-Ni and Co-Ni-M films for longitudinal recording

Suzuki, Hirokazu; Shiroishi, Y.; Hishiyama, S.; Ohno, Toshiyuki; Matsuda, Yukio; Matsunaga, Fumihiko; Tsumita, N.

doi:10.1109/tmag.1987.1065571

Cited by 16 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, Nolen and Fedkiw (2) reported increased selectivity for the reduction of nitrobenzene (NB) to p-aminophenol (PAP) using periodic-current control of a rotating disk electrode at nonkinetic-control conditions. Other examples of periodic voltage or current control of electroorganic reactions may be found in the literature [e.g., (3)(4)(5)(6)(7)(8)(9)]. …”

Section: Carnegie Mellon University Assisted In Meeting the Publicatimentioning

confidence: 99%

See 1 more Smart Citation

The Dependence of the Corrosion Behavior of Rigid Disk Magnetic Recording Media on the Deposition Conditions of the Underlayer, Magnetic Layer, and Carbon Overcoat

Sides

1992

J. Electrochem. Soc.

View full text Add to dashboard Cite

The electrochemical response of thin-film rigid-disk samples of magnetic recording media prepared by dc magnetron sputtering and immersed in 3% (mass) KC1 aqueous solution was investigated. The disk samples had the general formulation C/CoNi/NiP/Cr/A1Mg; some were tested without the carbon overcoat. The argon pressure and sputtering power during sample preparation were varied between 0.66 and 2.0 Pa and between 1.6 and 4.8 W/cm ~, respectively. Electrochemical impedance analysis and linear sweep voltammetry yielded values for the double-layer capacitance and the faradaic resistance of each sample. The crucial finding was that the deposition conditions of the chromium underlayer determined the corrosion properties of the films; an argon pressure of 0.66 Pa and RF power of 4.8 W/cm ~ for the Cr deposition yielded corrosion-resistant films, but values of 2 Pa and 1.6 W/cm 2 yielded easily corroded films (deposition conditions of the other layers being held constant). The corrosion-resistant films were flat, relatively featureless, and the c-axis of the grains of CoNi alloy was in the plane of the thin film. The films susceptible to corrosion were rough with sharp edges and possible microgaps in the carbon layer, and the c-axis of the magnetic layer was perpendicular to the plane.

show abstract

Section: Carnegie Mellon University Assisted In Meeting the Publicatimentioning

confidence: 99%

“…Specifically, the effect of deposition conditions of a disk media formulation, C/CoNi/Cr/NiP/AIMg, on the corrosion behavior was investigated. This formulation has been the subject of investigations of magnetic properties (4, 5) and of corrosion properties (1,2,6). The deposition conditions of the layers were varied to cover the normal range of production.…”

mentioning

confidence: 99%

The Dependence of the Corrosion Behavior of Rigid Disk Magnetic Recording Media on the Deposition Conditions of the Underlayer, Magnetic Layer, and Carbon Overcoat

Sides

1992

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

An XPS and AES study of the ageing of a Co–20%Ni metal‐evaporated tape

Mitton

Walton

Thompson

1993

Surface & Interface Analysis

View full text Add to dashboard Cite

The initial oxidation behaviour of a Ce2O%Ni alloy exposed to air and the longer term oxidation of a metalevaporated magnetic recording tape (MET) of the same composition have been studied using XPS and AES. An Auger depth profile through MET indicated the presence of significant oxygen below the surface oxide, which increased in concentration towards the metal/polymer interfaee. This is explained by penetration of oxygenlwater vapour into both voids and cracks formed during the manufacturing process.

show abstract