Condensed-matter physics: A magnetic pendulum.

The article presents a report on Magnetic domain walls, which can be considered to be self-assembled stable nanostructures; moreover, they can be created or annihilated by external action. The manipulation of domain walls in stripes has already been proposed as a way of storing information or even performing logic functions. Conventional (CMOS) electronics is facing major technical hurdles, particularly that of miniaturization. New approaches are needed to reduce energy dissipation and fabrication costs while maintaining the rate of reduction of dimensions, and must be implemented within 15–20 years.