Ideal medium: single bit 1 single-domain particle 6.12J/3.155J Microelectronic processing Patterned 100nm storage media Each pillar is single-domain can be magnetized up'or 'down 200nm Each bit(occupying about100×100mm,≈100Gbin2) onsists of 1000 grains; media noise largely eliminated Dec.10,2003D e c. 10 , 2 0 0 3 6.12J / 3.155J Microelectronic processing Ideal medium: single bit = 1 single-domain particle Patterned storage media 100 nm ‘1’ ‘0’ ‘1’ Each bit (occupying about 100 x 100 nm, ≈ 100 Gb/in2 ) consists of 1000 grains; media noise largely eliminated 200 nm Each pillar is single-domain, can be magnetized ‘up’ or ‘down’