Low-noise media using double-layer CoNiCr thin films for longitudinal recording

Hata, Hiroyuki; Fukuichi, T.; Yabushita, K.; Umesaki, M.; Shibata, H.

doi:10.1063/1.344803

Cited by 21 publications

(3 citation statements)

References 6 publications

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“…Multilayer magnetic recording films, which have thin nonmagnetic isolation layers, are reported to have both low noise and high signal to noise ratios (SNR). [1,2,3] A large amount of work has been done to investigate the effect of the interlayer from the point of view of magnetic interaction. However, ali the explanations were phenomenological in nature.…”

Section: Conicr and Cocrta Thin Filmsmentioning

confidence: 99%

The role of microstructural phenomena in magnetic thin films. Progress report, [August 1990--December 1991]

Laughlin¹,

Lambeth²

1991

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This report was prepared as an account of work sponsored by an agency of the United States Govgrnment. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability°r responai" !}_. ,_. _ _ _ bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Refer-, .. ...... enee herein to any specific commercial product, process, or service by trade name, trademark, manutacturer, or otherwise does not necessarily constitute or imply [ts endorsement, recommendation, or favoring by the United States Government or any agency thereof, The views and opinions of authors expressed herein do not necessarily state or reflect those of the United State,s Government or any agency thereof.

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Section: Conicr and Cocrta Thin Filmsmentioning

confidence: 99%

The role of microstructural phenomena in magnetic thin films. Progress report, [August 1990--December 1991]

Laughlin¹,

Lambeth²

1991

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“…On the other hand, dividing the recording layer into two or more sublayers by introducing nonmagnetic interlayers has been reported to be useful for reducing medium noise in the longitudinal media [10]- [12] and the CoCr-based perpendicular media [13]. For instance, introducing a Cr interlayer to the recording layer reduced the medium noise of the CoNi Cr longitudinal medium, the reduction being due to a decrease in exchange coupling between the recording sublayers separated by the interlayer [10].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, introducing a Cr interlayer to the recording layer reduced the medium noise of the CoNi Cr longitudinal medium, the reduction being due to a decrease in exchange coupling between the recording sublayers separated by the interlayer [10]. The division of the recording layer by TiCr interlayers also led to the reduction of medium noise for CoCr Pt and CoCr Pt Ta perpendicular media, which was due to a decrease in crystal grain diameter of the recording layer [13].…”

Section: Introductionmentioning

confidence: 99%

Reduction of medium noise of co-pd multilayered perpendicular magnetic recording media by a thin carbon interlayer

Sayama

Kawaji

Asahi³

et al. 2003

IEEE Trans. Magn.

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We report the effect of introducing a thin carbon interlayer to the recording layer on the read-write characteristics of Co-Pd multilayered perpendicular magnetic recording media. A 1-nm-thick carbon interlayer markedly reduced the medium noise and improved the output resolution, 50 . As a result, the signal-tonoise ratio at the recording density of 200 kFRPI for the medium was higher by 5 dB than that for the medium without the interlayer. We attribute these improvements in read-write characteristics to a decrease in the crystal grain diameter of the recording layer, resulting in suppression of the transition fluctuation of recorded bits. The Co-Pd multilayered perpendicular magnetic recording medium with carbon interlayer has a high thermal stability despite a slight degradation of perpendicular magnetic anisotropy.Index Terms-Carbon interlayer, Co-Pd multilayer, medium noise, perpendicular magnetic recording.

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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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Low-noise media using double-layer CoNiCr thin films for longitudinal recording

Cited by 21 publications

References 6 publications

The role of microstructural phenomena in magnetic thin films. Progress report, [August 1990--December 1991]

The role of microstructural phenomena in magnetic thin films. Progress report, [August 1990--December 1991]

Reduction of medium noise of co-pd multilayered perpendicular magnetic recording media by a thin carbon interlayer

Information Storage Materials, Magnetic

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