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Opportunities and Interfacial Challenges in Heat Assisted Magnetic Recording
Jeudi 1er février 2018 09:30 - Duree : 1 heureLieu : Salle Rémy Lemaire, K223
Orateur : Sukumar RAJAURIA (Western Digital, San Jose, California, USA)
The areal density of hard disk drives has increased rapidly due to a surge in big data generation and the demand for large capacity data storage. However, the areal density on conventional perpendicularmagnetic recording is approaching the fundamental superparamagneticlimit therefore limiting the ability tocontinue to scale traditional magnetic recording technology to higher storage densities. One promising way to overcome this limit is to useheat assisted magnetic recording (HAMR), which uses localized heat during the writing process to reduce the anisotropy field of the medium.HAMR technology requires the development of a number of additional novelcomponents : nano-scale heat source (spatial dimension 50nm), a new thermal design for the recording media, and a robust head disk interface. Here, I will discuss our efforts toward achieving a robust head-disk interface. Thehead-disk interface of hard disk drives is uniquely challenging with the recording headsflying at sub-nanometer spacing above the disk and move atrelative sliding speeds of 5-40m/s.Furthermore, in HAMR the head-disk interfaceexperience a large interface thermal gradient of 2-5*1011 K/m leading to reliability issues. As a result, and expectedly, a fundamental understanding and substantial optimization of interface materials (both head and disk) is needed to make this technology adequately robust for a mass market application.
Entité organisatrice : (Institut Néel)
Nature évènement : (Séminaire)
Site de l'évènement : Polygone scientifique
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