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Observation of Skyrmion Breathing Motion with X-ray Technique:Key Technology to Develop High-Efficiency Future Communication Devices

  • 조회. 371
  • 등록일. 2017.06.08
  • 작성자. Administrator

Observation

of Skyrmion Breathing Motion with X-ray Technique:



Key Technology to Develop High-Efficiency Future Communication Devices






-DGIST-KIST

collaborative research team identified the breathing movement of skyrmion,

which up to now had only been theoretical.



-The

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

called skyrmion.






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

signals.   






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

electronic devices.”



 



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.



 



Journal Reference



Seonghoon Woo, Jung-Il Hong, et al., "Spin-orbit

torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy," Nature Communications 2017.