of Skyrmion Breathing Motion with X-ray Technique:
Key Technology to Develop High-Efficiency Future Communication Devices
collaborative research team identified the breathing movement of skyrmion,
which up to now had only been theoretical.
future development of next generation communication devices with ultra-low
power and ultra-high frequency based on skyrmion are expected.
"Skyrmion," a swirling spin structure
arranged in the shape of a spiral, was demonstrated in 2009 and has been attracting
great attention in academia as a possible basic unit of ultra-high-density and
high-speed next generation memory devices due to its unique topological stability,
small size, and efficient movement. Recently, Korean researchers have developed
a technology that can be applied to the next generation ultra-low power and
ultra-high frequency communication devices by using a unique spin structure
The joint research team, DGIST-KIST
(Korea Institute of Science and Technology), explored a physical phenomena
applicable to a completely new type of next generation broadband communication devices
using a skyrmion spin structure, which had been beyond experimental observations.
There have been predictions
that it is possible to implement a unique kinetic movement of a skyrmion called
as *‘Skyrmion Breathing’ in a next generation high-frequency oscillator devices as
well as memory devices, However, due to the ultra-small size and ultra-fast
motion of the skyrmion, direct observations of skyrmion breathing motion has been
considered difficult to achieve.
* Skyrmion Breathing:
A unique magnetic dynamic motion that generates a new high frequency signal by
repeating the increase and decrease of the size of skyrmion in response to external
The results of this research
are the first in the world to describe the detailed ‘Skyrmion Breathing motions,’
based on experimental observations. The DGIST-KIST collaborative research team
successfully observed and measured the controlled motion and breathing of a
skyrmion in response to the external signals that occurs within a few
nanoseconds (nsec, 1 billionth of a second) using a synchrotron X-ray technique
with excellent time and space resolving powers*.
* Resolving Power: The
ability to identify the details of an object to be observed by an optical
device such as a microscope. Also known as resolution.
In addition, this research has
also developed an efficient skyrmion generation method using external current
pulses. It can be said that the results of this study are important because they
suggest that skyrmion can play a significant role in many other future electronic
devices, beyond memory devices, which had been of primary focus till now.
Director Jung-Il Hong from the
DGIST-LBNL Research Center for Emerging Materials said, “The new approach
utilizing ‘Skyrmion’ presented in the results of this study can suggest a new method
of operation for an entire device, so its implications are great in light of the
existing research trends.”
Senior Researcher Seong-hoon
Woo from the KIST Center for Spintronics said, “The research results show that
the high-efficiency next generation communication devices based on skyrmion are
actually feasible, which was previously presented only as a theory.” He then
added, “This research will contribute to accelerating the development of next
generation communication devices for efficient communication among future high-performance
The result was published on Wednesday
May 24, 2017 in the online edition of Nature
Communications, an international multidisciplinary scientific journal, and was
conducted with the supports of the KIST Institutional Project, Creative
Convergence Research Project, and Future Material Discovery Project of Spin-Orbitronic
Material Research Group supported by the Ministry of
Science, ICT, and Future Planning.
Seonghoon Woo, Jung-Il Hong, et al., "Spin-orbit
torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy," Nature Communications 2017.