TanzaniaPhysicists Find New Type of Magnetism
Altermagnets have no net magnetization and could unlock faster, more efficient computers. Researchers found experimental evidence for this new type of magnetism in a cobalt-intercalated tantalum diselenide material.
Global Newsflix 2 min read
Physicists have discovered a new type of magnetism that combines features of ferromagnetism and antiferromagnetism. This new type, called altermagnetism, was found in a material called cobalt-intercalated tantalum diselenide, or Co₁/₄TaSe₂.
In ferromagnets, like a refrigerator magnet, atomic spins line up in the same direction. In antiferromagnets, neighboring spins point in opposite directions and cancel each other out. Altermagnets, on the other hand, have no net magnetization, like antiferromagnets, but their electrons behave as if the material were magnetic.
The researchers used a technique called angle-resolved photoemission spectroscopy to map how electrons move inside the crystal. They first detected a characteristic splitting in the electronic bands of Co₁/₄TaSe₂, and then used spin-resolved angle-resolved photoemission spectroscopy to find that those split states carried opposite spin polarizations, key evidence of altermagnetism.
Madhab Neupane, a professor of physics at the University of Central Florida, said that altermagnets offer another possibility by combining desirable characteristics of both ferromagnets and antiferromagnets. They can avoid producing unwanted stray magnetic fields, but they can also generate and detect spin currents, which researchers hope to use for future electronics.
The discovery of altermagnetism could lead to the development of faster, more efficient computers that use electron spin rather than just charge. Constantin Schrade, an assistant professor of physics at Louisiana State University, said that altermagnets are different from standard magnets in that they have magnetic moments in the electrons that point in alternating directions.
The material Co₁/₄TaSe₂ is a layered material that contains magnetic cobalt atoms. It could serve as a flexible experimental platform for studying this unusual magnetic state and potentially helping advance electronic and spintronic technologies.
The researchers view Co₁/₄TaSe₂ as a promising material for further study of altermagnetism. They plan to continue researching the properties of this material and its potential applications in spintronics.
Key facts
- Altermagnets have no net magnetization, like antiferromagnets.
- Altermagnets can generate and detect spin currents, which could be used for future electronics.
- The material Co₁/₄TaSe₂ is a layered material that contains magnetic cobalt atoms.
- The discovery of altermagnetism could lead to the development of faster, more efficient computers.
Three perspectives
Neutral
The discovery of altermagnetism is a significant finding that could lead to advancements in spintronics. However, more research is needed to fully understand the properties of this new type of magnetism. The potential applications of altermagnetism are still being explored.
Positive
The discovery of altermagnetism is a major breakthrough that could lead to the development of faster, more efficient computers. This new type of magnetism has the potential to revolutionize the field of spintronics and enable the creation of new technologies. Researchers are excited about the possibilities that altermagnetism offers.
Negative
The discovery of altermagnetism is still in its early stages, and more research is needed to fully understand its properties and potential applications. There are still many challenges to overcome before altermagnetism can be used in practical devices. The development of altermagnetism-based technologies may take several years or even decades.
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