Authors: George Rajna
Skyrmions in Atomic Cobalt Films Scientists from Hamburg and Kiel have now been able to show that individual magnetic skyrmions with a diameter of only a few nanometers can be stabilized in magnetic metal films even without an external magnetic field.  Skyrmions are formed in magnetic systems via a variety of mechanisms, some of which work together.  Unique physical properties of these "magic knots" might help to satisfy demand for IT power and storage using a fraction of the energy.  A skyrmion is the magnetic version of a tornado which is obtained by replacing the air parcels that make up the tornado by magnetic spins, and by scaling the system down to the nanometre scale.  A new material created by Oregon State University researchers is a key step toward the next generation of supercomputers.  Magnetic materials that form helical structures-coiled shapes comparable to a spiral staircase or the double helix strands of a DNA molecule-occasionally exhibit exotic behavior that could improve information processing in hard drives and other digital devices.  In a new study, researchers have designed "invisible" magnetic sensors-sensors that are magnetically invisible so that they can still detect but do not distort the surrounding magnetic fields.  At Carnegie Mellon University, Materials Science and Engineering Professor Mike McHenry and his research group are developing metal amorphous nanocomposite materials (MANC), or magnetic materials whose nanocrystals have been grown out of an amorphous matrix to create a two phase magnetic material that exploits both the attractive magnetic inductions of the nanocrystals and the large electrical resistance of a metallic glass.  The search and manipulation of novel properties emerging from the quantum nature of matter could lead to next-generation electronics and quantum computers. 
Comments: 57 Pages.
[v1] 2019-08-24 03:01:22
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