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Plenarvorträge - DPG-Tagungen

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Plenarvortrag PV XIV Fr 09:15 H1<br />

Assault on storage density of 1 Terabit / sq-in and beyond —<br />

•Dieter Weller — Seagate Research, 1251 Waterfront Place, Pittsburgh<br />

PA 15222, U.S.A.<br />

The areal density in magnetic recording has surpassed ∼50 Gbit/in 2 in<br />

products and ∼100 Gbit/in 2 in laboratory demonstrations. These densities<br />

have been achieved with recording media comprised of Co-alloy nanostructured<br />

materials with horizontal orientation of the magnetization<br />

(longitudinal recording). Grain sizes are 8-10 nm and grain size distributions<br />

are near 20% (sigma over mean). Going much beyond 100 Gbit/in 2 requires<br />

magnetically harder materials with smaller, thermally stable grains<br />

(5–8 nm) and tighter distributions (

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