New Magnetic Phenomenon Found With Industrial Potential

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Edge Magnetism Discovered in CrGeTe3

Illustration of edge magnetism found in CrGeTe3 utilizing nanoscale magnetic microscopy. Credit score: Ori Lerman

Working with the tiniest magnets, Hebrew College discovers a brand new magnetic phenomenon with industrial potential.

For physicists, exploring the realm of the very, very small is a wonderland. Completely new and surprising phenomena are found within the nanoscale, the place supplies as skinny as 100 atoms are explored. Right here, nature ceases to behave in a approach that’s predictable by the macroscopic regulation of physics, not like what goes on on the earth round us or out within the cosmos.

Dr. Yonathan Anahory at Hebrew College of Jerusalem (HU)’s Racah Institute of Physics led the group of researchers, which included HU doctoral pupil Avia Noah. He spoke of his astonishment when pictures of the magnetism generated by nano-magnets, “it was the primary time we noticed a magnet behaving this fashion,” as he described the photographs that exposed the phenomenon of “edge magnetism.”

The pictures confirmed that the magnetic materials the HU researchers had been learning solely retained magnetism on its edge—in truth solely inside 10 nanometers of the sting (keep in mind a human hair is round 100,000 nanometers). Their outcomes had been not too long ago printed within the prestigious journal Nano Letters.

Avia Noah and Yonathan Anahory

Left to proper: HU’s Avia Noah and Yonathan Anahory. Credit score: Hebrew College

This nano-effect, though very small, might even have huge functions in our day by day lives. “In at this time’s technological race to make each element smaller and extra vitality environment friendly, effort is targeted in the direction of small magnets with completely different shapes,” Anahory shared. The brand new edge magnetism presents the opportunity of making lengthy wire magnets solely 10 nanometers thick, which might curve into any form. “It might revolutionize the best way we make spintronics gadgets,” added Anahory, referring to the next-generation nano-electronic gadgets with decreased energy consumption and elevated reminiscence and processing capabilities

The precise discovery of edge magnetism was considerably serendipitous: Anahory determined to take a look at a brand new magnetic nano-material (CGT) produced by his colleague on the Universidad Autónoma de Madrid, in Spain. The invention in the end relied on pictures produced by a brand new kind of magnetic microscopy developed in Israel, which may measure the magnetic area of a single electron. Discovering new phenomena depends on extremely refined new applied sciences. Additional, the phenomena themselves will probably be on the coronary heart of much more superior applied sciences as edge magnetism has demonstrated.

Reference: “Inside and Edge Magnetization in Skinny Exfoliated CrGeTe3 Movies” by Avia Noah, Hen Alpern, Sourabh Singh, Alon Gutfreund, Gilad Zisman, Tomer D. Feld, Atzmon Vakahi, Sergei Remennik, Yossi Paltiel, Martin Emile Huber, Victor Barrena, Hermann Suderow, Hadar Steinberg, Oded Millo and Yonathan Anahory, 10 March 2022, Nano Letters.
DOI: 10.1021/acs.nanolett.1c04665

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