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Nature Physics 4, 837–838 (1 November 2008) | doi:10.1038/nphys1122

Metal spintronics: Electronics free of charge

Claude Chappert & Joo-Von Kim

Conventional digital magnetic storage relies on electric currents to write information. In a hard disk, for example, large currents are used to generate magnetic fields to switch the magnetization of the nanoparticles on which binary data are stored.