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Mar 13, 2024
(Nanowerk Information) Altermagnets characterize a newly acknowledged class of supplies in magnetism that might allow novel functions in spin-based electronics. Their magnetically ordered state consists of an antiparallel association of microscopic magnetic moments, so-called spins, as in antiferromagnets.
In distinction to antiferromagnetism, nevertheless, the altermagnetic state with zero net-magnetization permits the technology {of electrical} currents with spin polarization, as required in spin-based electronics. Thus, altermagnets mix some great benefits of antiferromagnets, i.e., ultrafast dynamics, and ferromagnets, i.e., massive spin polarization.
In collaboration with a theoretical crew led by Professor Jairo Sinova and Dr. Libor Šmejkal, experimental physicist Dr. Sonka Reimers and her colleagues in Professor Mathias Kläui’s lab on the Institute of Physics at Johannes Gutenberg College Mainz (JGU) have demonstrated altermagnetic digital band splitting related to spin polarization in CrSb.
The crystal construction of altermagnetic CrSb: the coloured bubbles across the Cr atoms (blue) correspond to iso-spin density surfaces. Their anisotropy permits spin polarized currents. (Picture: Libor Šmejkal and Anna Birk Hellenes / JGU)
“The magnitude of this spitting, noticed in conductor and at room temperature, is extraordinary and promising with regard to digital functions of altermagnetic supplies”, stated Professor Martin Jourdan, coordinator of the examine not too long ago printed in Nature Communications (“Direct commentary of altermagnetic band splitting in CrSb skinny movies”).
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