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Title: Graphene overcoats for ultra-high storage density magnetic media
Authors: Dwivedi, N. 
Ott, A. K.
Sasikumar, K.
Dou, C.
Yeo, R. J. 
Narayanan, B.
Sassi, U.
Fazio, D. De
Soavi, G.
Dutta, T. 
Balci, O.
Shinde, S.
Zhang, J.
Katiyar, A. K.
Keatley, P. S.
Srivastava, A. K.
Sankaranarayanan, S. K. R. S.
Ferrari, A. C.
Bhatia, C. S. 
Issue Date: 17-May-2021
Publisher: Nature Research
Citation: Dwivedi, N., Ott, A. K., Sasikumar, K., Dou, C., Yeo, R. J., Narayanan, B., Sassi, U., Fazio, D. De, Soavi, G., Dutta, T., Balci, O., Shinde, S., Zhang, J., Katiyar, A. K., Keatley, P. S., Srivastava, A. K., Sankaranarayanan, S. K. R. S., Ferrari, A. C., Bhatia, C. S. (2021-05-17). Graphene overcoats for ultra-high storage density magnetic media. Nature Communications 12 (1) : 2854. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Hard disk drives (HDDs) are used as secondary storage in digital electronic devices owing to low cost and large data storage capacity. Due to the exponentially increasing amount of data, there is a need to increase areal storage densities beyond ~1 Tb/in2. This requires the thickness of carbon overcoats (COCs) to be <2 nm. However, friction, wear, corrosion, and thermal stability are critical concerns below 2 nm, limiting current technology, and restricting COC integration with heat assisted magnetic recording technology (HAMR). Here we show that graphene-based overcoats can overcome all these limitations, and achieve two-fold reduction in friction and provide better corrosion and wear resistance than state-of-the-art COCs, while withstanding HAMR conditions. Thus, we expect that graphene overcoats may enable the development of 4–10 Tb/in2 areal density HDDs when employing suitable recording technologies, such as HAMR and HAMR+bit patterned media © 2021, The Author(s).
Source Title: Nature Communications
ISSN: 2041-1723
DOI: 10.1038/s41467-021-22687-y
Rights: Attribution 4.0 International
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