On the transition length in perpendicular recording

Lopez, O.; Clark, David

doi:10.1109/tmag.1985.1063958

Cited by 5 publications

(1 citation statement)

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“…In most papers concerning thin film (perpendicular) recording media, the macroscooic magnetic parameters are used to explain the behaviour. However, for recording applications the upper part of these thin films, mostly considered magnetically homogeneous, becomes more important [1][2][3][4]. Using a thickness of only about 0.15 ~m, it seems to be more logical to consider the effect of changing properties in the thickness direction of the film into the macroscopic behaviour of films: if the first (atomic) layers of material at the substrate (the so-called initial layer) show deviating magnetic behaviour, they will contribute relatively strong to the overall properties.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic characterization of very thin CoCr films

Berge

Lodder

Porthun

et al. 1992

Journal of Magnetism and Magnetic Materials

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In this paper we describe the nucleation and growth o~ thin Co-Cr layers on different substrates and seedlayers. Especially the presence and formation of the initial layer is considered, and corresponding growth mechanisms are proposed. The magnetic properties of these layers have been analyzed by in-plane VSM and by anomalous Hall effect (AHE) measurements. Even layers as thin as 5 nm are shown to exhibit a perpendicular magnetic anisotropy. For a high coercive Co-Cr film the formation of dot-like domains is shown by the Bitter-colloid/SEM technique.

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Section: Introductionmentioning

confidence: 99%

Structural and magnetic characterization of very thin CoCr films

Berge

Lodder

Porthun

et al. 1992

Journal of Magnetism and Magnetic Materials

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Information Storage Materials, Magnetic

Lodder

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Magnetic recording is the storage of information achieved through changing the magnetization of a recording medium using a magnetic field generated by the recording head. At the end of the nineteenth century a start was made to use magnetism and magnetic media to store information. The first demonstration of magnetic recording was at the World's Fair in Paris in 1900. From this time on, the magnetic recording medium has gone through dramatic improvements. The steel wire was replaced in the early 1930s by small spherical Fe particles and later by cubic Fe 3 O 4 . Since then great improvements have been made by changing the material and the shape and size of the particle. In 1949, γ‐Fe 2 O 3 acicular particles with a length of 0.5 µm and an aspect ratio of 10 were used. Compact cassette tape made from CrO 2 particles was introduced in 1966. From the early 1950s thin magnetic films have been proposed as a magnetic recording medium. Since then extensive research has been carried out and many thin‐film media have been proposed made by electroless and electrodeposition, vacuum evaporation, and sputtering. At present many recording media are prepared by vacuum deposition technologies; mostly hard disk applications for magnetic recording as well as magnetooptic recording. Sony presented the first evaporated tape for video application in 1989. The so‐called ME tapes have also been made for audio applications. An enormous amount of research is being carried out on the new hard disk media, mostly produced by sputtering, in order to obtain high densities. Since 1977 much research has been carried out on media proposed for the application of perpendicular magnetic recording.

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Preparation, Microstructure and Magnetic Properties of Co-Cr Thin Films

Lodder

1993

High Density Digital Recording

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On the transition length in perpendicular recording

Cited by 5 publications

References 9 publications

Structural and magnetic characterization of very thin CoCr films

Structural and magnetic characterization of very thin CoCr films

Information Storage Materials, Magnetic

Preparation, Microstructure and Magnetic Properties of Co-Cr Thin Films

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