Spintronics spin(magnetism)-based electronic devices 6.12J/3.155J Microelectronic processing The smaller the better Ww→ MIX Spin memory Separator Device is lost over x, t non-mag metal = low-impedance spin valve or spin switch Unlike semiconductor devices insulator = high-impedance performance of spin-tunnel junction (Messervey and Tedrow, Phys. Rpts. 238, 174( 96) spin-based devices Moodera et al. Phys. Rev. Lett. 80, 2941 (98) improves as thickness decreases because screening lengths and spin diffusion lengths in metals < than in semiconductors Dec.10,2003D e c. 10 , 2 0 0 3 6.12J / 3.155J Microelectronic processing Unlike semiconductor devices, performance of spin-based devices improves as thickness decreases because screening lengths and spin diffusion lengths in metals << than in semiconductors. Spintronics = spin (magnetism)-based electronic devices Separator Device non-mag metal => low-impedance metal => low-impedance spin valve or spin switch insulator => high-impedance insulator => high-impedance spin-tunnel junction (Messervey and Tedrow, Phys. , Phys. Rpts. 238, 174 (‘96); Moodera et al. Phys. Rev. et al. Phys. Rev. Lett. 80, 2941 (‘98)) The smaller the better x M (x) Spin memory is lost over x, t e-