First altermagnetic domain observation in ruthenium dioxide opens pathway for engineering ultra-fast, high-density spintronic memory

https://www.eurekalert.org/news-releases/1128925

"adds 3rd magnetism class to ferromagnets/ antiferromagnets... crystal structure: anti-parallel individual magnetic moments are oriented, yet strong spin polarized electronic bands... no macroscopic magnetic field, so tracked via subtle heat signatures... ultimately, by demonstrating that these altermagnetic domains can be systematically mapped and manipulated, this milestone unlocks a highly scalable architectural pathway for engineering ultra-fast, high-density spintronic computing memory"