Electronics

Important for global 6G developers

Research team from Osaka Metropolitan University Discovered that a magnetic structure called a chiral spin soliton lattice is essential for global 6G developers.

Researchers at Osaka Metropolitan University (OMU) have detected collective resonance for the first time in a very high and wide frequency band. In a magnetic superstructure known as the “chiral spin soliton lattice” (CSL), they found that small changes in magnetic field strength can cause resonance at such frequencies. As a result, it became clear that the chiral helicopter magnet that hosts the CSL is a promising material in the future. Communication technology6G and so on.

CSL phonon mode (or collective resonance mode) is observed in a chiral magnetic crystal known as “CrNb3S6”. By utilizing broadband microwave spectroscopy, scientists have detected an unprecedented collective resonance mode over a very high and wide frequency band. They found that even small changes in the strength of the magnetic field could cause resonance in the CSL at frequencies above 5G.

This study was recently Physical review letter..

Discovering how to use CSL in 6G technology

The competition to recognize 6th generation (6G) wireless communication systems requires the development of suitable magnetic materials. Scientists at OMU and his colleagues have detected unprecedented collective resonance at high frequencies in a magnetic superstructure called the chiral spinsoliton lattice (CSL), which hosts the CSL as a promising material for 6G technology. Revealed the magnet.

The research team points out that future communication technologies will need to expand the frequency band from the current gigahertz (GHz) to over 100GHz. Such high frequencies are not currently feasible, as existing magnetic materials used in telecommunications equipment can only resonate and absorb microwaves up to about 70 GHz in a magnetic field of practical strength. To address this knowledge-technical gap, scientists led by Professor Yoshihiko Togawa of OMU delved into the helicoid spin superstructure CSL.

“CSL has a periodically adjustable structure that can be continuously modulated by changing the strength of the external magnetic field,” explains Professor Togawa. “CSL phonon mode, or collective resonance mode (when the CSL kink collectively oscillates around the equilibrium position), allows for a wider frequency range than traditional ferromagnets.”

Pursuit of CSL phonon mode

CSL phonon mode is understood theoretically, but has not been observed in experiments. The team experimented with CrNb3S6, a typical chiral magnetic crystal that hosts CSL, with the aim of discovering the CSL phonon mode. They first generated CSL with CrNb3S6 and then investigated its resonant behavior when the external magnetic field strength was changed. A specially designed microwave circuit was utilized to detect the magnetic resonance signal.

The research team investigated resonance in three modes: Kittel mode, asymmetric mode, and multiple resonance mode. In Kittel mode, the resonant frequency increases only when the magnetic field strength increases, as observed with traditional ferromagnets. In other words, an unrealistic strong magnetic field is required to create the high frequencies required for 6G. CSL phonons were not found even in asymmetric mode.

In addition, CSL phonons were detected in the multiple resonance mode. In contrast to what is observed with the magnetic materials currently in use, the frequency increases spontaneously as the strength of the magnetic field decreases. This is an unprecedented phenomenon and may allow boosts above 100 GHz in relatively weak magnetic fields. This boost is a very necessary mechanism to achieve 6G operability.

“We succeeded in observing this resonance motion for the first time,” concludes Dr. Yusuke Shimamoto, the lead author. “Due to its excellent structural controllability, the resonance frequency can be controlled in a wide band up to the band below terahertz. This wide band and variable frequency characteristic exceeds 5G, and it will be utilized for research and development of next-generation communication technology. Is expected. “

https://www.innovationnewsnetwork.com/chiral-spin-soliton-lattice-global-6g/22487/?utm_source=rss&utm_medium=rss&utm_campaign=chiral-spin-soliton-lattice-global-6g Important for global 6G developers

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