Topography (left) and magnetic force microscopy image (right) of ferromagnetic islands in paramagnetic film. Magnetic image looks like a sub-micron dipole array. Dark and light areas on right image correspond to different poles. This is perspective data storage medium. Both images were obtained simultaneously by two-pass method.

Sample courtesy of Yu.K. Verevkin, V.N. Petryakov, N.N. Salaschenko, Institute of Applied Physics RAS, Nizhni Novgorod, Russia;
N.I. Polushkin, Institute for Physics of Microstructures RAS, Nizhni Novgorod, Russia.
A.M. Alexeev et al. Pis'ma v ZhETF 73, 214-219 (2001).