Shape affects magnetization reversal
Categorie(s) : News, Research
Published : 4 February 2016
Magnetic objects of the same composition but with different geometries demonstrate different magnetization reversal behavior. Researchers at INAC have discovered that the shape and direction of the wires (in systems made of aluminum oxide and cobalt wires and platinum) determined the spatial distribution of spin-orbit coupling in the object, and therefore the angular momentum required to reverse magnetization.
The researchers were able to characterize the relationship between shape and magnetic properties. They then made bipolar switches for memory as well as irreversible switches. Their concept can be applied to many materials. The shape of the system can be determined at the lithography stage; good news because lithography is the simplest and most flexible fabrication process.