Magnetization Reversal

Magnetization Reversal

Magnetization reversal, or switching, represents the process that leads to a 180° reorientation of the magnetization vector with respect to its initial direction, from one stable orientation to the opposite one. Technologically, this is one of the most important processes in magnetism that is linked to the magnetic data storage process such as currently used in hard disk drives . As it is known today, there are only few possible ways to reverse the magnetization of a metallic magnet:

  1. magnetization reversal in an applied magnetic field
  2. magnetization reversal by spin injection
  3. magnetization reversal by circularly polarized light

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Other articles related to "magnetization, magnetization reversal":

Gallium Manganese Arsenide - Properties
... The magnetic properties were inferred from magnetization dependent Hall measurements of the channel ... the electric field was used to modify the coercive field at which magnetization reversal occurs ... hysteresis on the gate bias the electric field could be used to assist magnetization reversal or even demagnetize the ferromagnetic material ...
Magnetization Reversal By Circularly Polarized Light
... this effect is generally called all-optical magnetization reversal ... This magnetization reversal technique refers to a method of reversing magnetization in a magnet simply by circularly polarized light and where the magnetization direction is controlled by the light helicity ... In particular, the direction of the angular momentum of the photons would set the magnetization direction without the need of an external magnetic field ...

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