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New Electron Microscopy Technique Resolves Magnetic Behavior on the Scale of Angstroms

admin by admin
April 13, 2023
in News


Permanent magnets, like those found on refrigerators everywhere, exist because their constituent atoms act as miniature magnets.

Pinshane Huang and her researchers have imaged magnetic behavior at the smallest scales to date. Image Credit: Heather Coit/Grainger Engineering.

These atoms align and integrate to create a larger magnet in a phenomenon known as ferromagnetism. However, few materials exhibit atomic magnets that develop an alternating pattern, resulting in no net magnetization.

These antiferromagnets have garnered attention for their potential to create faster and more compact magnetic memory devices for computing.

To unlock the full potential of antiferromagnetic devices, it is crucial to understand their atom-to-atom magnetic patterns, which have yet to be achieved. However, a team of scientists at the University of Illinois Urbana-Champaign, led by Pinshane Huang, MatSE associate professor and Ivan Racheff Faculty Scholar, has made significant progress towards this goal.

In the journal Ultramicroscopy, the researchers describe a new electron microscopy technique with the potential to resolve magnetic behavior on the scale of angstroms, which is a tenth of a nanometer, almost at the scale of individual atoms. They use this method to fully resolve the antiferromagnetic order in iron arsenide for the first time.



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