Physics

Gold structure improves spin wave transmission and addresses overheating issues in electronics

Schematic diagram of spin wave transmission characteristics with and without nanostructures. Credit: POSTECH

A research team has made a breakthrough that significantly increases the commercial viability of spin wave technology. This innovation is attracting attention as a next-generation technological solution to the persistent problem of heat generation in electronic devices. The study results were published online in Matter on September 26th.

After using your smartphone or computer for a while, you may be surprised to suddenly notice that your device is getting hot. This is because the movement of electrons within the device as it processes and stores data converts some energy into heat. With the rapid advances in artificial intelligence and cloud computing, electronics are becoming smaller and more complex, exacerbating the problem of overheating.

Information transmission technology using spin waves is attracting attention as a means to solve the problem of heat generation in electronic devices. Spin waves are waves that utilize the spin characteristics of electrons in magnetic insulators and can transmit information without going through the flow of electrons.

Recent studies have shown that increasing the temperature imbalance of spin waves within a material, that is, the tendency for spin waves on one side of the material to get hotter and the other side cooler, increases spin wave information transfer efficiency. has been. However, there is no technology that can independently control the temperature of spin waves.

A joint research team from POSTECH, Chungnam National University, and KAIST has developed a new approach inspired by radiator fins used to cool automobile engines. The researchers incorporated nanometer-scale gold structures into one end of a thin film of magnetic insulator, designed to effectively control temperature based on the gold concentration.

These gold structures effectively reduced the temperature of the spin waves at the target location, creating a temperature imbalance within the material. Their experiments demonstrated that this thin film improved spin wave transmission efficiency by more than 250% compared to traditional methods. This study reports for the first time that we have succeeded in independently controlling the spin wave temperature, and demonstrates how to use this control to increase the spin wave transmission efficiency.

Professor Hyung-gyu Jin of POSTECH, who led the research, stated the significance of the research, saying, “This research is an important milestone in the development of next-generation information transmission technology to deal with heat generation in electronics.”

“By overcoming previous limitations, this technology has promising potential for a wide range of future applications using spin waves,” said Dr. Sangjun Park, lead author of the study.

The team was led by Professor Hyungyu Jin and Dr. Sang Jun Park (currently a postdoctoral researcher at the National Institute for Materials Science) from the Department of Mechanical Engineering at POSTECH, and collaborated with Professor Jong-Ryul’s research team. A research team consisting of Jeong from the College of Materials Science and Engineering at Chungnam University and Professor Se Kwon Kim from the Department of Physics at the Korea Advanced Institute of Science and Technology (KAIST).

More information: Sang J. Park et al, Enhanced spin pumping by nonlocal manipulation of magnon temperature, Matter (2024). DOI: 10.1016/j.matt.2024.08.023

Provided by Pohang University of Science and Technology

Citation: Gold structure improves spin wave transmission to address overheating problem in electronics (October 22, 2024) https://phys.org/news/2024-10-gold-electronics-overheating-problem Retrieved October 22, 2024 from .html

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