A proposed beam-addressable memory

Mee, C. Denis; Fan, Guoliang

doi:10.1109/tmag.1967.1066003

Cited by 48 publications

(10 citation statements)

References 12 publications

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“…Heat-assisted magnetic recording (HAMR) is a technique to further increase the areal density (AD) in recording media in the future [1][2][3][4][5] . Conventional recording techniques are not able to overcome the so-called recording trilemma 6 : To further increase the areal storage density of recording media, smaller grains are needed.…”

Section: Introductionmentioning

confidence: 99%

Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording

Muthsam¹,

Vogler²,

Suess³

2019

Journal of Magnetism and Magnetic Materials

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We investigate how a temperature reduction in z−direction influences the switching probability and the noise in heat-assisted magnetic recording (HAMR) for a bit in bit-patterned media with dimensions d = 5 nm and h = 10 nm. Pure hard magnetic bits are considered and simulations with a continuous laser pulse are performed using the atomistic simulation tool VAMPIRE. The results display that the switching behavior shows a thermally induced exchange spring effect. Simultaneously, both the AC and the DC noise increase. Additionally, we illustrate how an artificial Curie temperature gradient within the material can compensate the HAMR performance loss due to the temperature gradient. Further, due to the graded Curie temperature, DC noise can be reduced compared to a structure where no temperature gradient is considered.

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Section: Introductionmentioning

confidence: 99%

Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording

Muthsam¹,

Vogler²,

Suess³

2019

Journal of Magnetism and Magnetic Materials

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“…The next generation recording technology to increase the areal storage density of hard drives beyond 1.5 Tb/in 2 is heat-assisted magnetic recording (HAMR) [1][2][3][4][5][6] . Higher areal storage densities (ADs) require smaller recording grains.…”

Section: Introductionmentioning

confidence: 99%

The superior role of the Gilbert damping on the signal-to-noise ratio in heat-assisted magnetic recording

Muthsam,

Slanovc,

Vogler

et al. 2019

Preprint

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“…The anisotropy is limited by the maximum available magnetic field of write heads. One strategy to overcome this so called magnetic recording trilemma is heat-assisted magnetic recording (HAMR) [1][2][3][4]. A laser spot locally heats recording bits near or above the Curie temperature.…”

Section: Introductionmentioning

confidence: 99%

Areal density optimizations for heat-assisted magnetic recording of high-density media

Vogler

Abert

Bruckner

et al. 2016

Journal of Applied Physics

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Heat-assisted-magnetic recording (HAMR) is hoped to be the future recording technique for high density storage devices. Nevertheless, there exist several realizations strategies. With a coarsegrained Landau-Lifshitz-Bloch (LLB) model we investigate in detail benefits and disadvantages of continuous and pulsed laser spot recording of shingled and conventional bit-patterned media. Additionally we compare single phase grains and bits having a bilayer structure with graded Curie temperature, consisting of a hard magnetic layer with high TC and a soft magnetic one with low TC, respectively. To describe the whole write process as realistic as possible a distribution of the grain sizes and Curie temperatures, a displacement jitter of the head and the bit positions are considered. For all these cases we calculate bit error rates of various grain patterns, temperatures and write head positions to optimize the achievable areal storage density. Within our analysis shingled HAMR with a continuous laser pulse moving over the medium reaches the best results, and thus having the highest potential to become the next generation storage device.

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A proposed beam-addressable memory

Cited by 48 publications

References 12 publications

Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording

Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording

The superior role of the Gilbert damping on the signal-to-noise ratio in heat-assisted magnetic recording

Areal density optimizations for heat-assisted magnetic recording of high-density media

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