NamibiaPhysicists Find New Type of Magnetism
Altermagnets have no net magnetization, but electrons behave as if the material were magnetic, making them attractive for spintronics. This new type of magnetism combines features of ferromagnetism and antiferromagnetism.
Global Newsflix 2 min read
Physicists have found experimental evidence for a new type of magnetism, called altermagnetism, in a material called cobalt-intercalated tantalum diselenide (Co 1/4 TaSe 2).
In ferromagnets, atomic spins line up in the same direction, while in antiferromagnets, neighboring spins point in opposite directions and cancel each other out. Altermagnets 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 a crystal, including measurements that distinguish between spin 'up' and spin 'down' electrons.
They found that the material Co 1/4 TaSe 2 appears to be an altermagnet, with electrons behaving as if the material were magnetic, but with no net magnetization.
Madhab Neupane, a professor of physics at the University of Central Florida, said that altermagnets offer another possibility by combining desirable characteristics of both ferromagnetism and antiferromagnetism.
Altermagnets can avoid producing unwanted stray magnetic fields, like antiferromagnets, 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 electronics that use electron spin rather than just charge.
Key facts
- Altermagnets have no net magnetization, but electrons behave as if the material were magnetic.
- Altermagnets combine features of ferromagnetism and antiferromagnetism.
- The material Co 1/4 TaSe 2 appears to be an altermagnet.
- Altermagnets can generate and detect spin currents without producing stray fields.
Three perspectives
Neutral
The discovery of altermagnetism is a significant finding in the field of physics, and its potential applications are being explored. Further research is needed to fully understand the properties of altermagnets and their potential uses. The development of altermagnetism could lead to new technologies and innovations.
Positive
The discovery of altermagnetism could lead to the development of faster, more efficient electronics that use electron spin rather than just charge. This could revolutionize the field of electronics and lead to new technologies and innovations. Altermagnets could also enable the creation of more efficient and powerful devices.
Negative
The development of altermagnetism is still in its early stages, and significant technical challenges need to be overcome before it can be widely adopted. The production of altermagnetic materials can be complex and difficult, which could limit their use. Further research is needed to fully understand the properties of altermagnets and their potential limitations.
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