Figure 1: Cross-sectional view of a nanopillar spin-valve device. For an idealized model in which the free-layer magnetization behaves as a single domain, the Néel–Brown prediction for the activation ...

A coil of wire, or solenoid, consists of a wire coiled up into a spiral shape. When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet. The field ...