Exchange coupled composite media for heat assisted magnetic recording

Liu, Zengyuan; Victora, R. H.

doi:10.1063/1.4978461

Cited by 6 publications

(1 citation statement)

References 16 publications

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“…An analytic theory based on energy barrier calculation is proposed. These interesting trends are due to the linearity of energy barrier versus temperature at the high temperature region close to the Curie temperature [3]. Fig.…”

Section: Interlayer Effectsmentioning

confidence: 79%

Composite media for high density heat assisted magnetic recording

Liu

Jiao

Victora

2016

Applied Physics Letters

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A heat assisted magnetic recording composite media with a superparamagnetic writing layer is proposed. The recording process is initiated in the write layer that is magnetically softer than the long term storage layer. Upon cooling, the composite structure copies the information from the writing layer to the lower Curie temperature (Tc) storage layer, e.g., doped FePt. The advantages include insensitivity to Tc variance in the storage layer, and thus the opportunity to significantly lower the FePt Tc without the resulting Tc distribution adversely affecting the performance. The composite structure has a small jitter within 0.1 nm of the grain size limit owing to the sharp transition width of the optimized superparamagnetic writing layer. The user density of the composite structure can reach 4.7 Tb/in.2 for a Gaussian heat spot with a full-width-at-half-maximum of 30 nm, a 12 nm reader width, and an optimized bit length of 6 nm.

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Section: Interlayer Effectsmentioning

confidence: 79%