Y. K. Takahashi (SIMES Seminar)

Date(s) - Oct 12 2015
2:00 PM - 3:00 PM

Cypress Room, Building 40, Room 147


FePt granular media for high density hard disk drives

Y.K. Takahashi

National Institute for Materials Science, Japan

A demand for high capacity hard disk drives is increasing due to the rapidly expansion of the digital information in the world. One of the promising materials for high density recording media is FePt due to its high magneto-crystalline anisotropy. However, FePt grains with few nm diameter need high magnetic fields for magnetization switching. This means magnetic information cannot be stored using currently existing write head technology. To overcome this problem, new recording methods are proposed which is so called heat assisted magnetic recording (HAMR). We have been developing FePt-based magnetic recording media and apply some external energy to the media for assisting the magnetization reversal. In this talk, I present the material science of FePt-based media and the possibility of FePt-based media to HAMR and novel all-optical recording application.