Already some research in the past has shown that magnetic skyrmions, quasi-particles predicted theoretically and observed experimentally made of small nanoscopic vortices existing in special magnetic materials, could be used to store digital data. The latter could be decoded according to the presence or essence of a given sequence along the magnetic band.
Now a team of researchers from German institutes has discovered that skyrmions and antiskyrmions can coexist and this could make possible a strong expansion of the storage capacity of such a system.
In the study, published in Nature Communications, the possibility of storing digital data through magnetic circuits made of nanoscopic magnetic strips in which the data are encoded in magnetic nano-objects, essentially based on their presence or absence in specific positions, is considered.
The nano-object to be used could be the skyrmione, a small magnetization vortex that is extremely stable. These small nanoscopic objects can be “written”, eliminated, read and moved by magnetic currents.
Now researchers have discovered that skyrmions and antiskyrmions, opposite magnetic vortexes, can coexist, under certain conditions, in the same type of material.
This happens at a temperature of critical tradition. This is a discovery that could allow an advanced version of a digital archiving typology, the one based on skyrmions, already futuristic in itself. A sequence of bits, for example, could be encoded by a sequence of skyrmions (1) and anti skyrmions (0).