期刊
JOURNAL OF APPLIED PHYSICS
卷 119, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4953390
关键词
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资金
- Vienna Science and Technology Fund (WWTF) [MA14-044]
- Advanced Storage Technology Consortium (ASTC)
- Austrian Science Fund (FWF) [F4112 SFB ViCoM, I2214-N20]
- CD-laboratory AMSEN - Austrian Federal Ministry of Economy, Family and Youth
- National Foundation for Research, Technology and Development
- Austrian Science Fund (FWF) [I2214] Funding Source: Austrian Science Fund (FWF)
Heat-assisted magnetic recording (HAMR) is hoped to be the future recording technique for high-density storage devices. Nevertheless, there exist several realization strategies. With a coarsegrained Landau-Lifshitz-Bloch model, we investigate in detail the benefits and disadvantages of a 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 realistically 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 has the highest potential to become the next-generation storage device. Published by AIP Publishing.
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