The energy world has been rocked by a leap in condensed matter physics and digital technology and it’s opened up a whole new direction in the phenomenon of magnetism. There are fascinating implications for digital devices and spintronic applications, and scientists say that the discovery merges the best features of established forms of magnetism.
“Altermagnetism” is a new direction in condensed matter physics
A team of scientists and researchers from the University of Nottingham in the United Kingdom have discovered a new magnetic phase that they’ve named “altermagnetism,” a term that’s soon to be a new buzzword in the energy sector. The discovery has the potential to generate transformative advancements in digital devices and spintronic applications.
Study co-author and professor of physics and astronomy at the University of Nottingham, Dr Peter Wadley, explained the science of altermagnetism:
“Altermagnets consist of magnetic moments that point antiparallel to their neighbors. However, each part of the crystal hosting these tiny moments is rotated with respect to its neighbors. This is like antiferromagnetism with a twist! But this subtle difference has huge ramifications.”
What’s the context of the leap in condensed matter physics?
Magnetism is fundamental in modern technology and has been for decades. It’s utilized for items such as hard drives and applied to complex quantum research situations. Ferromagnetism and antiferromagnetism, which are the two main categories used in science, have several advantages, but also some limitations.
Commercial memory devices rely on ferromagnets for their internal magnetism qualities, however, they have scalability limitations and are inefficient. Antiferromagnets, on the other hand, offer speed and resilience but are missing the spintronic properties needed to integrate the technology on a broader scale.
The latest breakthrough in the discovery of a third class of magnetism, altermagnetism, brings the two magnetism paradigms together with the advantages of both but without the challenges.
Scientists in other parts of the world are also working on ways to harvest energy from the Earth’s magnetism, so we may see another leap in technology on a different front soon.
What are the implications of altermagnetism and how will it be applied?
Lead study author and senior research fellow at the University of Nottingham, Dr Oliver Amin, explained what his research team achieved:
“Our experimental work has provided a bridge between theoretical concepts and real-life realization, which hopefully illuminates a path to developing altermagnetic materials for practical applications.”
The study was published in Nature and details how scientists demonstrated how to visualize and control altermagnetic states in manganese telluride (MnTe) at nanoscale resolution.
What makes altermagnetism so special?
Altermagnets don’t exhibit any net magnetization, unlike ferromagnets, which makes them favorably energy-efficient. They also retain strong spin-current effects similar to ferromagnets, which means they can be used in high-performance memory technology.
Altermagnetism offers the potential for scalable, energy-efficient instruments, and the implications of the discovery are expected to be significant.
If net magnetization is not present, altermagnetic materials become compatible with superconductors and other acute phases. Unlike traditional magnetic materials that are affected by external disturbances, altermagnets’ vanishing net magnetization means they function reliably well in extreme conditions. This is an important advantage for processes that require durability and precision.
The implications for spintronics are especially exciting
The scientists at the University of Nottingham’s discovery could influence the way developers envision digital and neuromorphic spintronic devices. Altermagnets offer unparalleled flexibility to apply to designing spintronic systems by combining the advantages of ferromagnetic and antiferromagnetic qualities.
University of Nottingham PhD student Alfred Dal Din is honored to have been part of the team that discovered altermagnetism:
“To be amongst the first to see the effect and properties of this promising new class of magnetic materials has been an immensely rewarding and challenging privilege.”
It’s not farfetched to believe that in just a few years, we’ll be seeing leaps in technology thanks to altermagnetism, and it’s an exciting phase for science.
A different technological advancement in another field comes in the form of a crystal ball that generates power. It can be installed in a range of locations and serves as a design aspect as well as a practical, operational power source.