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Séminaire invité Spintec

Characterization of the Switching Distributions of Heat-Assisted Magnetic-Recording Media

Mardi 22 novembre 2022 à 16:00, Salle de séminaire 445, bâtiment 1005, CEA-Grenoble (accès réservé aux personnes ayant un badge CEA)

Publié le 22 novembre 2022
Pierre-Olivier Jubert
Senior Technologist at Western Digital, San Jose (USA)
Heat-assisted magnetic recording (HAMR) employs a laser-coupled near-field transducer (NFT) in the write head to locally heat the FePt recording layer. HAMR features larger temperature gradients producing higher effective field gradients at the recording transitions than PMR recording. Yet, the distributions of the FePt grains’ magnetic properties, if too large, limit the system’s areal density performance. It is therefore important to characterize the magnetic property distributions for each media, at time scales and temperatures at which the magnetic recording takes place. I will present a measurement method called THMap that uses conventional recording systems to extract the temperature and field distributions of HAMR media at recording time scales. This method also provides useful information about the head/medium recording system. If time allows, I will also touch upon optical and thermal design considerations for HAMR media looking at the relevance of anisotropic heatsinks for heat-assisted magnetic recording (HAMR).

Plus d'information : https://www.spintec.fr/seminar-characterization-of-the-switching-distributions-of-heat-assisted-magnetic-recording-media/

Pour suivre le seminaire en visioconférence : https://webconf.cea.fr/ioan-lucian.prejbeanu/C89D5FFJ