Control of crystallographic texture in magnetic thin films for ultra-high density storage media

Guruswamy, Sivaraman; Shield, Jeffrey E.; Tarakçı, Mehmet

doi:10.1016/s1359-6462(98)00209-7

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Experiments have demonstrated that the texturing causes preferential in-plane -axis alignment along the grooves, with a larger out-of-plane canting perpendicular to the grooves [2]- [4], stress anisotropy in the Cr underlayer and the Co magnetic layer [5], [6], and disruption of the magnetic coupling at the texture lines in the film [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Micromagnetic study of anisotropy sources in textured longitudinal media

et al. 2001

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Micromagnetic simulations were performed to determine the effects of three anisotropy sources on the orientation ratio (OR) in circumferentially-textured longitudinal recording media. Models of the Co -axis distribution, disruption of the magnetic coupling due to the texture lines, and stress anisotropy were used to generate hysteresis loops in both parallel and perpendicular directions. Parameters were obtained from experimental measurements. Of these three anisotropy sources, a preferential alignment of the Co -axis along the grooves produces the largest OR; disruption of the magnetic coupling yields a smaller OR value, but leads to the perpendicular loop closing outside the parallel loop. Although the stress anisotropy increases the coercivity in both directions, the OR is the smallest. A combination of these three anisotropy sources, as well as a weak intergranular exchange, leads to agreement with the experimental measurement of OR.

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Section: Introductionmentioning

confidence: 99%

Micromagnetic study of anisotropy sources in textured longitudinal media

et al. 2001

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“…Its potentiality of better surface morphology performance is considered to meet the magnetic alloy deposition requirement of longitudinal recording. It has been demonstrated that the texturing process induces preferential in plane alignment along the texture line grooves 16 and distribution of the magnetic coupling at the texture lines. 17 Circumferential and redial direction of hysteresis loop of disks A and B is shown in Fig.…”

Section: Surface Morphology and Oxidationmentioning

confidence: 99%

Investigation of hard drive disk surface oxidation on magnetic recording properties

Tan

Chen

Lee

2008

Surface Engineering

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Hard drive disk magnetic recording properties are strongly related to disk surface oxidation, and becomes more sensitive as the areal recording density continues to increase progressively in hard disk drives. Disk cleaning processes with and without H 2 O 2 chemical cleaning solutions were used on textured NiP/Al substrates to study the effects of surface oxidation on the performance of the hard disk. Atomic force microscopy, magnetic force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, vibrating sample magnetometer and Guzik are employed to elucidate the surface morphology, oxide composition, magnetic orientation ratio and related magnetic recording properties.Based on the results, cleaning without H 2 O 2 chemical solutions offers a lower surface oxidation, more uniform surface morphology, higher orientation ratio and better magnetic recording properties as compared to cleaning with H 2 O 2 chemical solutions. A lower direct current erase noise is the major contributing factor for the resulting signal noise ratio improvement when H 2 O 2 was not added in cleaning process.

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Effect of diamond types on textured surface morphology and magnetic performance in hard disk

Tan

Chang²

2005

Diamond and Related Materials

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Control of crystallographic texture in magnetic thin films for ultra-high density storage media

Cited by 9 publications

References 14 publications

Micromagnetic study of anisotropy sources in textured longitudinal media

Micromagnetic study of anisotropy sources in textured longitudinal media

Investigation of hard drive disk surface oxidation on magnetic recording properties

Effect of diamond types on textured surface morphology and magnetic performance in hard disk

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