What is it about?
Transitioning from fifth-generation (5G) to sixth-generation (6G) wireless telecommunications requires new technologies and materials with specific physical properties. Magnetic materials such as iron-platinum (FePt) due to its unique magnetic properties, is currently being used for the next stage of hard disk drive (HDD) technology, heat assisted magnetic recording (HAMR); this technology, HAMR, is being rolled out by major HDD makers such as Seagate as of this year. However, for FePt to be used for 6G applications the magnetic property know as "damping" needs to be reduced. In this article, we focus on reducing the magnetic damping in FePt by changing the growth conditions of the material. We explore the damping in FePt via laser light and observe a lower damping in certain samples of FePt grown using improved growth conditions.
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Why is it important?
We show by engineering the nanostructure (~0.000000001 m) of FePt, we can significantly reduce the magnetic damping in this material opening up the possibility of using this material and similar magnetic materials for 6G applications. By controlling the number of what is known as "misfit dislocations", the damping in magnetic materials can be controlled. These results are pivotal for the transition from 5G to 6G , improved network speeds and greater data transfer.
Perspectives
Writing the article was a great opportunity to work with leading researchers at NIMS in an area of research which is of great interest to the wider community. Performing the research and writing this article helped improve my understanding of industry standards and establish a foothold in this research, key to my career development.
Phillip Bentley
Kansai Institute for Photon Science, National Institutes for Quantum Science and Technology
Read the Original
This page is a summary of: Development of L10-ordered FePt with low damping and large perpendicular magnetic anisotropy by engineering the nanostructure, Applied Physics Letters, January 2025, American Institute of Physics,
DOI: 10.1063/5.0246369.
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