Researchers Confirm New Magnetic Phase of Altermagnets at DOE Labs
U.S. researchers have established altermagnetism as a new magnetic phase, revealing insights into manganese telluride's properties for future technologies.
Researchers at the U.S. Department of Energy’s SLAC National Accelerator Laboratory and Oak Ridge National Laboratory have confirmed the existence of altermagnetism, a new magnetic phase distinct from ferromagnetism and antiferromagnetism. This discovery, documented in the journal Science, provides proof of a theoretical concept first proposed in 2022.
The teams focused on manganese telluride (MnTe), a material previously categorized as antiferromagnetic. Their findings demonstrated that MnTe exhibits a unique asymmetric magnetic structure known as chirality. Lead researcher Daniel Jost noted, “This chiral signature gave us the solid experimental ground to say altermagnetism stands in a class of its own.”
Altermagnets combine characteristics of both ferromagnets and antiferromagnets. Unlike ferromagnets that have a net magnetization, altermagnets maintain zero net magnetization while generating spin-polarized currents. This dual functionality presents a potential solution for issues faced by conventional magnetic materials, particularly in spintronic applications.
To validate the properties of MnTe, researchers used advanced X-ray scattering techniques to observe how chiral materials interact with polarized light. They established that MnTe exhibits an alternating spin configuration with a distinctive geometric twist in its lattice that is absent in traditional antiferromagnets.
According to Rachel Nickel, a postdoctoral scientist involved in the research, “Altermagnetism was only proposed a few years ago, and the rapid progress in confirming these models is incredible.” This rapid advancement indicates a significant potential for altermagnetic materials in developing faster and more efficient electronic devices, including memory systems and quantum technologies.
Feng Ye, a neutron scientist at ORNL, emphasized the importance of neutron scattering in revealing these new magnetic behaviors. He stated, “What’s exciting is that one creative experimental idea, a small mechanical squeeze between two plates, can reveal entirely new magnetic behavior.” This simple method of applying mechanical pressure to alter magnetic domains signals new possibilities for future electronics.
Both studies indicate that mechanical pressure can facilitate better control of magnetism in altermagnets, thereby influencing electron flow and magnetic properties crucial for next-generation technologies.
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Bhupendra Singh Chundawat is a seasoned technology journalist with over 22 years of experience in the media industry. He specializes in covering the global technology landscape, with a deep focus on manufacturing trends and the geopolitical impact on tech companies. Currently serving as the Editor at Udaipur Kiran, his insights are shaped by decades of hands-on reporting and editorial leadership in the fast-evolving world of technology.