Feasibility of Perpendicular Magnetic Printing at 1 Tb/in$^{2}$

Komine, Takashi; Murata, Toshinori; Sakaguchi, Y.; Sugita, R.

doi:10.1109/tmag.2008.2002367

Cited by 12 publications

(1 citation statement)

References 4 publications

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“…Printing performance PP was evaluated from the calculated magnetization distribution in the soft and hard layers. The PP in each layer was estimated by using the following definition [9]:…”

Section: Calculation Methodsmentioning

confidence: 99%

Effect of layer thickness ratio on magnetization reversal process in stacked media with high coercivity

Oyama

Sugita

2014

EPJ Web of Conferences

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Abstract. Effect of thickness ratio and interlayer exchange coupling on time-evolutional magnetization reversal process in stacked media with high coercivity was investigated by utilizing micromagnetic simulation. Regardless of the layer thickness ratio, for each stacked medium the magnetization reversal process is divided into three regions, namely the spin-flop rotation, the incoherent rotation and the coherent rotation along with increase of the interlayer exchange coupling constant A interlayer . In order to get the incoherent rotation region which is suitable for the recording media, it is required that the A interlayer is between about 1.3×10 -7 and 2.2×10 -7erg/cm for the media with the layer thickness ratio of 1 : 3 and 3 : 1, and that one is between about 1.8×10 -7 and 2.5×10 -7 erg/cm for the media with the ratio near 1 : 1.

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“…Printing performance PP was evaluated from the calculated magnetization distribution in the soft and hard layers. The PP in each layer was estimated by using the following definition [9]:…”

Section: Calculation Methodsmentioning

confidence: 99%

Effect of layer thickness ratio on magnetization reversal process in stacked media with high coercivity

Oyama

Sugita

2014

EPJ Web of Conferences

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Numerical analysis of perpendicular magnetic printing for hard disks beyond 2 Tb/in2

2011

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Combinatorial dependence of magnetic printing characteristics in double magnet master media for energy-assisted magnetic recording

Komine

2023

AIP Advances

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In this study, the combinatorial dependence in double magnet master for energy-assisted magnetic recording was investigated by the micromagnetic framework. Four kinds of master media, which are soft single magnet (SSM), hard single magnet (HSM), soft double magnet (SDM) and hard double magnet (HDM), were compared. Comparing single magnet and double magnet master media, more adequate combination of double magnet master media was discussed. The HSM, SDM, and HDM master media can write line/space (L/S) pattern with bit length of 20 nm, while the double magnet master media can clearly print L/S patterns comparing with single magnet in case of 10 nm. For higher coercivity EAMR media, the larger printing field causes larger recording field difference by utilizing SDM master media while in case of HDM the recording field difference is almost constant even if the printing field increases. As a result, since the recording field difference of SDM becomes larger than that of HDM as the printing field strengthens, thus, SDM master media can write the servo signals onto higher coercivity EAMR media. It was concluded that it is important for the low coercivity parts of double magnet master media to have a larger saturation magnetization due to enhancement of large recording field difference.

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Feasibility of Perpendicular Magnetic Printing at 1 Tb/in$^{2}$

Cited by 12 publications

References 4 publications

Effect of layer thickness ratio on magnetization reversal process in stacked media with high coercivity

Effect of layer thickness ratio on magnetization reversal process in stacked media with high coercivity

Numerical analysis of perpendicular magnetic printing for hard disks beyond 2 Tb/in2

Combinatorial dependence of magnetic printing characteristics in double magnet master media for energy-assisted magnetic recording

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