Microstructure and micromagnetics of future thin-film media

Futamoto, Masaaki; Inaba, Nobuyuki; Hirayama, Yoshiyuki; Ito, K.; Honda, Yukio

doi:10.1016/s0304-8853(98)00492-2

Cited by 28 publications

(6 citation statements)

References 16 publications

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“…has been shown to be highly dependent on Cr concentration (over a factor of 2 increase in with a 7 at.% decrease in Cr concentration) [21], so variations in Cr concentration from grain to grain will produce a distribution in . Grain size and deposition temperature will affect the extent of Cr segregation to the grain boundaries and therefore the Cr concentration remaining in the grain interior [22].…”

Section: B Distribution In Magnetocrystalline Anisotropymentioning

confidence: 99%

Microstructure and thermal stability of advanced longitudinal media

Doerner¹,

Tang²,

Arnoldussen³

et al. 2000

IEEE Trans. Magn.

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Thermal stability will ultimately limit the maximum areal density achievable with conventional longitudinal recording.The key aspects of the media microstructure contributing to thermal stability are the grain size and grain size distribution, alloy composition, alloy segregation, lattice defects and strain. Grain size distributions are created by the random nucleation processes occurring during media deposition. For media on glass substrates, -axis in-plane preferred orientation can be achieved with either Co (1120) or (1010) planes parallel to the substrate surface. Improved squareness, , is observed with the (1120) orientation due to stronger crystallographic texture, however, larger changes in coercivity with decreasing magnetic layer thickness are observed compared to (1010). Continued increases in areal density will require tighter grain size distributions and improved microstructural control of very thin magnetic layers.

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Section: B Distribution In Magnetocrystalline Anisotropymentioning

confidence: 99%

Microstructure and thermal stability of advanced longitudinal media

Doerner¹,

Tang²,

Arnoldussen³

et al. 2000

IEEE Trans. Magn.

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“…New generation products with perpendicular recording technology are considered as the way to reach higher densities [1,2]. Perpendicular recording, based on thin lms, requires thin lm magnetization to be explored.…”

Section: Introductionmentioning

confidence: 99%

Thickness Dependent Magnetic Properties of Polycrystalline Nickel Thin Films

Parlak

Aköz²,

Öztürk³

et al. 2015

Acta Phys. Pol. A

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Magnetization directions of ferromagnetic ultra-thin lms can be altered by increasing the thickness. The transition between in-plane and out-of-plane axes is induced by the competition among the magnetostatic, magnetocrystalline and magnetoelastic anisotropy energies. Such an eect has attracted more interest recently, due to the applications in magneto-optical recording technologies. In this study, we have investigated by magneto-optical Kerr eect the magnetization properties of magnetron sputtered nickel thin lms.

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“…1 (b) and (c). Magnetic separation between crystalline grains forming the recording layer is achieved by segregation of nonmagnetic Cr element along the crystalline grain boundaries (2)(3)(4). The magnetic bit length was more than several times greater than the Co-alloy crystal grain size, and thus the magnetic grain diameter distribution was not a strong factor which influenced the recording performance of longitudinal HDD media.…”

Section: Shift From Longitudinal To Perpendicular Magnetic Recording mentioning

confidence: 98%

Development of Thin Film Technology for High-Density Magnetic Recording Media

Futamoto

2013

ECS Trans.

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The paper briefly reviews the development of thin film technology of longitudinal and perpendicular magnetic recording media. Based on experimental results on current high-end perpendicular media, future possibilities are discussed. Limitations associated with granular-type media are reduced by introducing a new-type media, bit patterned media (BPM) with which the thermal stability, the resolution, and the signal to noise ratio of recorded bit information can be more easily maintained. The shift from granular media to BPM will take place at any areal density ranging between 1 - 6 Tb/in2. When a magnetic material with very high Ku is applied to BPM, an areal density of more than 60 Tb/in2 seems feasible.

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Microstructure and micromagnetics of future thin-film media

Cited by 28 publications

References 16 publications

Microstructure and thermal stability of advanced longitudinal media

Microstructure and thermal stability of advanced longitudinal media

Thickness Dependent Magnetic Properties of Polycrystalline Nickel Thin Films

Development of Thin Film Technology for High-Density Magnetic Recording Media

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