Science has the key magnetic material to make 6G technology, has successfully increased production speed by 30 times

Tram Ho

Materials scientists have successfully developed a method for producing iron oxide epsilon and demonstrated the potential for next-generation telecommunications devices. Thanks to the special magnetic properties, the demand for this material could increase in the production of next generation 6G telecommunications equipment as well as magnetic data storage devices. This work is published in the Journal of Materials Chemistry C, a journal published by the Royal Society of Chemistry.

Khoa học có trong tay vật liệu từ tính then chốt để tạo nên công nghệ 6G, đã tăng thành công tốc độ sản xuất lên 30 lần - Ảnh 1.

Thanks to the special magnetic properties, the demand for this material could increase in the production of next generation 6G telecommunications equipment as well as magnetic data storage devices.

Iron oxide is one of the most common oxides on Earth. It occurs in nature as hematite agar (alpha iron oxide, α-Fe 2 O 3 ). A more stable and used variant is maghemite (aka the gamma variant, γ-Fe 2 O 3 ). The first variant is used industrially as a red dye, the gamma variant is used in data storage applications using magnetism. These two variants differ not only in crystal structure (alpha iron oxide has a hexagonal structure while gamma iron oxide has a cubic structure) but also in magnetic properties.

In addition to the above forms of iron oxide, there are rarer variants such as epsilon-, beta-, zeta-, even vitreous. The most interesting variant is epsilon iron oxide or ε-Fe 2 O 3 . This variant has extremely high magnetic resistance, reaching 20 kOe units at room temperature, comparable to magnets using rare elements. In addition, the material absorbs electromagnetic radiation in the sub-terahertz range (100-300Ghz) through the natural ferromagnetic resonance effect. The resonant frequency is also a criterion that makes this material suitable in telecommunications equipment applications – 4G standards use frequencies in the megahertz level and 5G uses frequencies in the tens of gigahertz. Generation 6G is intended to use sub-terahertz frequencies, coming out around 2030.

This material is suitable for use in the manufacture of switching units or circuits that absorb waves at the above frequencies. For example, it is possible to create paints capable of absorbing electromagnetic waves that help protect rooms from interfering signals by using nanopowder ε-Fe 2 O 3 . The material could also be used in 6G receivers.

Khoa học có trong tay vật liệu từ tính then chốt để tạo nên công nghệ 6G, đã tăng thành công tốc độ sản xuất lên 30 lần - Ảnh 2.

This variant has extremely high magnetic resistance, in addition, the material absorbs electromagnetic radiation in the sub-terahertz range (100-300Ghz).

Epsilon iron oxide is a very rare and difficult to harvest form of iron oxide. Today, it can only be synthesized in very small amounts, and the process takes months. Naturally, this hinders the wide applicability of this amazing material. The study authors have developed a method of synthesizing ε-Fe 2 O 3 30 times faster, in just one day that can achieve more product. The technique is easy to perform, inexpensive and can be easily applied in industry, with materials requiring only iron and silicon – the two most readily available elements on Earth.

Although epsilon iron oxide was discovered in its pure form a long time ago in 2004, it has not yet found industrial application due to the complex synthesis process. We have found a way to simplify this technology ,” said Evgeny Gorbachev, a Ph.D. student in the Materials Science research department at Moscow State University and the study’s author.

Khoa học có trong tay vật liệu từ tính then chốt để tạo nên công nghệ 6G, đã tăng thành công tốc độ sản xuất lên 30 lần - Ảnh 3.

This new material opens the door to higher frequencies (hundreds of gigahertz).

The key to successful application of this groundbreaking material is the study of its physical properties. Without in-depth studies, this material could have been forgotten for many more years, a common occurrence in the history of science. Thanks to the team of scientists at Moscow State University who synthesized this compound, and the physicists at MIPT who thoroughly studied the material that has made it so successful today.

“Materials with high ferromagnetic resonance frequencies have great potential for practical applications. Today, terahertz-based technologies are exploding: the Internet of Things, high-speed telecommunications, specialized scientific devices, and a new generation of medical devices. Compared to the new 5G standard that became popular last year, operating on frequencies of tens of gigahertz, this new material opens the door to access to higher frequencies (hundreds of gigahertz), which means we can advance to 6G standards or higher. We are happy to share this knowledge with our engineers so we can see 6G devices launch soon,” said Professor Liudmila Alyabyeva, Ph.D., researcher in the MIPT lab at the company Terahertz Spectroscopy where terahertz frequency studies are performed.

According to Phys.org

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Source : Genk