Science, Space and Technology News 2024
Altermagnetic crystal: not only the directions of spin polarization alternate on neighboring magnetic atoms, but also the atomic shapes themselves – as shown by tilting the dumbbell-shaped electron densities in two different directions. The blue beamline illustrates the photoemission experiment on a synchrotron that was used to demonstrate altermagnetism.
At the same time, however, the ferromagnetic field poses a serious limitation to the spatial and temporal scalability of the components. Thus, a significant research focus in recent years has been on the second, antiferromagnetic branch of magnets. Antiferromagnets are lesser known but much more common materials in nature, where the directions of the atomic magnetic fields on adjacent atoms are staggered like white and black colors on a chessboard.
Experimental evidence conducted on a material considered for decades to be a “classical antiferromagnet”. The researchers decided to examine crystals of a simple two-element altermagnetic candidate – manganese telluride . Traditionally, this material has been considered one of the classical antiferromagnets because the magnetic moments on neighboring manganese atoms point in opposite directions, and so do not create an external magnetic field around the material.
The study drew on the expertise of researchers at the Institute of Physics at Johannes Gutenberg University Mainz in Germany in collaboration with scientists from the Czech Academy of Sciences in Prague, the Paul Scherrer Institute in Switzerland, the University of West Bohemia in Pilsen, the University of Linz in Austria, theThe discovery of altermagnetism opens new research directions
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