MAGNETOELECTRONIC COMPONENTS AND MEASUREMENT METHOD

摘要

Disclosed are magnetoelectronic components that comprise: at least one elongate operating structure which is made of a ferromagnetic material and along which magnetic domain walls can migrate; means for applying to this operating structure an electric current; and at least one magnetic field sensor for the magnetic field emitted by the operating structure. According to the invention, the operating structure is designed such that it comprises domain walls, the transverse magnetizing direction of which has no preferred direction in the center thereof in the plane perpendicular to the migration direction of the domain walls along the operating structure, and/or such that the operating structure can form massless domain walls. It was detected that the kinetic energy of this type of moving domain walls disappears, and hence they are not subject to the Walker limit nor to intrinsic pinning. As a result, the components can input, save or process and ultimately output information more quickly. The invention also relates to a method for measuring a non-adiabatic spin transfer parameter ß of a ferromagnetic material. This method was developed during the course of an in-depth study of the phenomena detected.