Magnetspeicher
A 1940s – 1950s Portable Dictaphone
Portable Dictaphone made by EMI - the Emidicta. Recordings would be made magnetically on a flat disk of magnetic material.
Bild: Black Country Museums
Nanoscale vortices
Argonne materials scientist Mihaela Tanase observes a small magnetic disk with a transmission electron microscope. At Argonne's Center for Nanoscale Materials, Tanase discovered a new method to control the way the atoms in the magnetic disk orient themselves to form "nanoscale vortices,", which are illustrated on the computer screen.