Origin of perpendicular magnetic anisotropy of Co-CoO evaporated film

Yoshida, Kazuo; Takayama, T.

doi:10.1016/0304-8853(89)90158-3

Cited by 13 publications

(8 citation statements)

References 10 publications

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“…The saturation magnetization strongly decreases with increasing oxygen content. This is explained by the fact that the oxygen is incorporated into nonmagnetic CoO crystallites (Nakamura et al, 1984;Yoshida and Takayama, 1989). The Co-CoO films are uniaxial with perpendicular anisotropy for all oxygen content.…”

Section: Perpendicular Metal Evaporated Mediamentioning

confidence: 95%

“…The Co-CoO films are uniaxial with perpendicular anisotropy for all oxygen content. But the anisotropy constant is maximum at an optimum oxygen content which depends on the film thickness and the deposition parameters (Nakamura et al, 1984;Tateno et al, 1989;Yoshida and Takayama, 1989). Dipolar contributions affect the hysteresis loops such that films with a perpendicular remanence larger than the longitudinal remanence are obtained only at high enough oxygen content.…”

Section: Perpendicular Metal Evaporated Mediamentioning

confidence: 97%

“…The Co grains have hcp structure with their c-axis oriented out-of-plane. The origin of perpendicular anisotropy of the Co-CoO films is explained qualitatively from the contributions of both the magnetocrystalline anisotropy and the columns shape anisotropy (Yoshida and Takayama, 1989). But the recording properties of these thick films were not as good as those of the oblique metal evaporated media (Tateno et al, 1989) and the work on perpendicular metal evaporated media was temporally stopped.…”

Section: Perpendicular Metal Evaporated Mediamentioning

confidence: 98%

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Metal Evaporated Media

Jubert

Onodera

2012

Handbook of Magnetic Materials

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Section: Perpendicular Metal Evaporated Mediamentioning

confidence: 95%

Section: Perpendicular Metal Evaporated Mediamentioning

confidence: 97%

Section: Perpendicular Metal Evaporated Mediamentioning

confidence: 98%

See 1 more Smart Citation

Metal Evaporated Media

Jubert

Onodera

2012

Handbook of Magnetic Materials

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“…The technology introduced oxygen into the Co-alloy thin films, which had a similarity with that of the magnetic tape technology that employed low noise Co-CoO recording layers [80][81][82] .…”

Section: Introductionmentioning

confidence: 99%

Development of Media Nanostructure for Perpendicular Magnetic Recording

Futamoto

Ohtake

2017

J. Magn. Soc. Jpn.

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The review covers the research and development of perpendicular media nanostructure focusing on the recording layer. The recording layer material includes the Co-alloys with hcp structure, the magnetic multilayers, and the alloys with ordered structures that have high magneto-crystalline anisotropies (Ku). The technologies of underlayer or interlayer for aligning the easy magnetization axis of magnetic crystal grain perpendicular to the film plane are briefly reviewed including the high Ku magnetic materials for future recording media.Observations of compositional and magnetization structures in sub-µm scale have played important roles in improving the recording layer. Typical data on these characteristics are explained in relation to the media structure improvements. Considering that high Ku magnetic materials will be employed in future recording media, basic experimental results related in controlling the easy magnetization axis and in keeping the surface flatness of L10-ordered magnetic materials are explained. Future possibilities for increasing the areal density beyond 1 Tb/in 2 by improving the magnetic material and the nanostructure of recording layer are also discussed.

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“…There are, however, few reports relating to the recording characteristics of CO-O thin films [2][3][4][5][6], in which the incident angles are changed in a wide range from in-plane direction to perpendicular direction. This paper describes the incident angle dependence of the magnetic properties, the crystallographic structure, morphological structure and the recording characteristics.…”

Section: Introductionmentioning

confidence: 99%

Recording Characteristics of Obliquely Evaporated Thin Co-O Films

et al. 1994

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The dependence of the magnetic properties, crystallographic structure, morphological structure and recording characteristics on the angle of incidence were studied on the obliquely evaporated thin Co-O films. The preferred c-axis orientation angle of Co in Co-O films is almost equal to the minimum incident angle( e min), because the growth at the initial deposition stage around the maximum incident angle( emax) is very thin and has little magnetization due to oxidization. The Co-O film deposited at emin of 40· exhibits a maximum output at a recording density of 100kFCI, which is higher by 5dB than that of ME tape for a high-band 8mm VCR.

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Origin of perpendicular magnetic anisotropy of Co-CoO evaporated film

Cited by 13 publications

References 10 publications

Metal Evaporated Media

Metal Evaporated Media

Development of Media Nanostructure for Perpendicular Magnetic Recording

Recording Characteristics of Obliquely Evaporated Thin Co-O Films

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