A HAMR Media Technology Roadmap to an Areal Density of 4 Tb/in$^2$

Autor:	Antony Ajan, Barry C. Stipe, Oleksandr Mosendz, Ganping Ju, Eric J. Champion, Xiaobin Wang, Gregory Parker, Dieter Weller, Timothy J. Klemmer
Rok vydání:	2014
Předmět:	Thermal conductivity Nuclear magnetic resonance Materials science Curie temperature Area density Technology roadmap Laser power scaling Electrical and Electronic Engineering Engineering physics Grain size Electronic Optical and Magnetic Materials
Zdroj:	IEEE Transactions on Magnetics. 50:1-8
ISSN:	1941-0069 0018-9464
Popis:	This paper discusses heat-assisted magnetic recording (HAMR) media requirements and challenges for areal densities (AD) beyond 1 Tb/in2. Based on recent roadmap discussions the focus is primarily on granular chemically ordered L10 FePtX-Y-perpendicular media with reduced average grain size down to 〈D〉 = 3-5 nm relative to current CoCrPt based perpendicular magnetic recording (PMR) media with average grain size 〈D〉 = 7-9 nm. In HAMR media the combination of thermal conductivity and Curie temperature TC determines the required laser power during recording. Key challenges are sigma variations of D and TC which need to be reduced to σD/D ~ 10-15% and σTC/TC ~ 2%. In addition AD is limited by switching field distribution (SFD) and thermal spot size. The key goal going forward is to optimize heads, media, head-media-spacing (HMS) and read-back channel technologies to extend AD to 4 Tb/in2 and beyond.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::814dc1637fd57e51d059c3626d63425e https://doi.org/10.1109/tmag.2013.2281027 Zobrazit plný text záznamu