DuPont sources

http://www.npr.org/2010/12/17/132118276/spintronics-a-new-way-to-store-digital-data
http://en.wikipedia.org/wiki/Spintronics
http://spectrum.ieee.org/semiconductors/memory/spintronic-memories-to-revolutionize-data-storage/0
http://www.physics.udel.edu/~bnikolic/teaching/ss_spintronics/ss_spintronics.html