US EditionSpin loss Repurposed to Drive Low-Power Magnet Switching
The KIST team developed a device principle that converts electron spin loss into a power source, enhancing spintronic device energy efficiency by up to three times, enabling ultra-low-power computing.
- On August 25, 2025, Dr. Dong-Soo Han's team at KIST developed a device principle using 'spin loss' as a new power source for magnetic control, reported in Nature Communications.
- Because spin loss was long viewed as waste, reversing magnetization traditionally required large current methods that forced electron spins, limiting efficiency.
- Measured results indicate the current-driven spin escape method flows current directly into the magnet, triggering self-switching and achieving three times energy efficiency over conventional methods.
- Practical scalability suggests this simple, semiconductor-compatible technology supports mass production and miniaturization, potentially advancing ultra-low-power memory, neuromorphic computing, and AI semiconductors.
- Dr. Dong-Soo Han emphasized the shift when he said `Until now, the field of spintronics has focused only on reducing spin losses, but we have presented a new direction by using the losses as energy to induce magnetization switching.
13 Articles
13 Articles
Scientists turn spin loss into energy, unlocking ultra-low-power AI chips
Scientists have discovered that electron spin loss, long considered waste, can instead drive magnetization switching in spintronic devices, boosting efficiency by up to three times. The scalable, semiconductor-friendly method could accelerate the development of ultra-low-power AI chips and memory technologies.
Magnetization switching driven by magnonic spin dissipation - Nature Communications
Efficient control of magnetization in ferromagnets is crucial for high-performance spintronic devices. Magnons offer a promising route to achieve this objective with reduced Joule heating and minimized power consumption. While most research focuses on optimizing magnon transport with minimal dissipation, we present an unconventional approach that exploits magnon dissipation for magnetization control, rather than mitigating it. By combining a sin…
'Spin loss' based magnetization switching
A structure that describes a new principle by which a magnetic material can self-switch its magnetization direction through spin loss when a current is passed through it. When current flows, spins are generated inside the magnetic material, and some spins escape in the direction of the antiferromagnet on the right. Normally, this spin escape is considered a 'loss', but in this study, this loss creates the same effect as the spin entering…
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