Swirling objects known
as magnetic vortices and skyrmions can be miniaturized without sacrificing mobility, a KAUST - led international research team has found.
Not exact matches
The team found that this «pins» the
magnetic flux lines in place
as the wires sweep through the field, preventing the formation of swirling
magnetic vortices that reduce current flow.
And the total sum of the winding numbers of
vortices that wink in and out of existence
as a
magnetic field is applied around the doughnut always stays the same.
In order to use skyrmions
as a storage medium, it must be possible to manufacture the surfaces or interfaces on a sufficiently large scale, they must contain enough of the
magnetic material, and the
magnetic vortex must also occur at room temperature.
We try to be
as plausible
as possible about the astrophysics and creating a solar system with a system of moons, and then the atmospheric conditions, even the
magnetic fields of the Flux
Vortex.
These defects «pin» in place, or trap, the microscopic
magnetic vortices that form when the superconductor is placed in a strong
magnetic field, such
as those generated by magnets in
magnetic resonance imaging (MRI) machines.
The experiments in Jülich showed that although the
magnetic vortices alter in strength and direction when heated up, they go back to their original state
as they cool down.
Using intense x-rays generated at Berkeley University's Advanced Light Source, the team captured time - resolved images of whirlpool patterns called
magnetic vortices as they gyrated along a nanometer - wide half - ring track.
«The
vortex - antivortex motion requires the interplay between the hard and soft
magnetic layers
as well
as the stray fields of the whole
magnetic trilayer,» said Maria Vélez, co-author of the paper and associate professor of condensed matter physics at the University of Oviedo.
The sensor also detected tiny
magnetic vortices, which appear and disappear
as the material becomes superconducting and may be a key to understanding how these materials become superconducting at high temperatures.
It's
as if the conducting paths for
vortex motion in the
magnetic trilayers can be dynamically rewired.
The key to this understanding are the concepts of a «torque» and the of natural power of «swirling
vortices»
as these phenomena that relate to the role of the atmosphere, the oceans, the Earth's «molten outer core,» and formation of Earth's
magnetic field on climate change.