Scientific FrontlineMar 9, 2024
#Antiferromagnetic (AF) #crystals like #NiO are experiencing a renaissance as promising materials for ultrafast #spintronics.
#MaterialScience #Physics #Technology #Spintronics #sflorg
https://www.sflorg.com/2024/03/ms03082402.html
Exploring the Surface Properties of NiO with Low-Energy Electron Diffraction

Researchers revisit low-energy electron diffraction to reconfirm prior surface analysis data on antiferromagnetic NiO

Ashwin Nanjappa 🐘Feb 15, 2024

"The fields of atoms in an antiferromagnetic material point in opposite directions to those of their neighbours, cancelling each other out perfectly."

"In altermagnetism, neighbouring atoms could end up with spins pointing in opposite directions if the atoms themselves were rotated by 90 degrees compared with their neighbours."

https://www.economist.com/science-and-technology/2024/01/24/scientists-have-found-a-new-kind-of-magnetic-material

#TheEconomist #antiferromagnetic #altermagnetism

Scientists have found a new kind of magnetic material

“Altermagnets” have been hiding in plain sight for 90 years

The Economist
katch wreckDec 5, 2023

"..an archetypal antiferromagnet—#haematite—hosts a rich tapestry of monopolar, dipolar & quadrupolar emergent magnetic charge distributions. The direct read-out of the previously inaccessible vorticity of an #antiferromagnetic spin texture provides the crucial connection to its #magnetic charge through a #duality relation."

https://www.nature.com/articles/s41563-023-01737-4

Revealing emergent magnetic charge in an antiferromagnet with diamond quantum magnetometry - Nature Materials

Diamond quantum magnetometry is utilized to directly read the vorticity of antiferromagnetic spin textures through coupled multi-polar emergent magnetic charge distributions.

Nature