Magnetic Domain Propagation

12 1 3 magnetic domain walls.

Magnetic domain propagation. By combining magneto optical kerr effect and magnetoresistance measurements we show that domain wall propagation fields can be doubled under locally applied strains. Upon exposure of mnps to an amf the reorientation of the magnetic moments can produce energy in the form of heat by a variety of mechanisms. Magnetic dws are a continuous transition between two magnetization states in systems with pma that means the up and down states.

Domain wall propagation along the wires. The amplitude of the applied field was 0 82 mt. Magnetic transmission electron microscopy is a powerful tool for imaging the magnetic domain and analyse in situ their movement.

The spin rotation inside a dw is defined by the direction in which the intermediate state is aligned that is along either the length or the width of the dw. The barkhausen volume v b is generally the smallest volume in. These results highlight the prospect of constructing low power domain wall gates for magnetic logic devices.

In the propagation and interactions of magnetic domains however demands that the magnetization be aligned to lie normal to the surface of the film. Normally it is considered that the m reversal takes place by nucleation and propagation of the magnetic domain wall which lies in a plane perpendicular to the wire axis. When the size of the material decreases the number of magnetic domains is also reduced until eventually a single domain is reached in the case of small mnps monodomain mnps smaller than approximately 25 30 nm in diameter while larger mnps up to 100 nm in diameter usually have several magnetic domains multidomain mnps.

The field dependence of domain wall velocity is well described by a creep model of a 1d wall in the presence of weak disorder with critical exponent µ 1 4. Introduction the study of domain wall dw propagation in magnetic nanostructures is a subject of great current. Most of the investigations on dw propagation using lorentz microscopy ltem are done on planar configuration 1 2.

µ0hc of this film was 3 5 mt. It offers a nanoscale resolution and is very sensitive to magnetic induction inside the sample. Cylindrical magnetic domains exhibited in the single crystal platelets such as orthoferrites meets.