Friday 14 March 2025
Scientists have made a significant breakthrough in understanding the magnetic properties of thin films, which could lead to the development of more efficient and compact storage devices.
Researchers at the Universidad Técnica Federico Santa María in Chile and the Indian Institute of Technology Delhi have been studying the behavior of CoFeB (cobalt-iron-boron) thin films, which are commonly used in magnetic storage devices such as hard drives. They found that by adding a layer of tungsten (W) to the film, they could significantly increase its coercivity – the strength required to switch the magnetization direction.
The team used a process called sputtering to deposit the CoFeB and W layers onto a substrate. They then annealed the samples at different temperatures to study how this affected their magnetic properties.
Their findings showed that the addition of a W layer significantly improved the coercivity of the CoFeB film, particularly when it was annealed at high temperatures. The team also observed that the W layer helped to crystallize the CoFeB film, which is important for its magnetic properties.
The researchers used various techniques such as X-ray diffraction and magnetometry to study the magnetic properties of the samples. They found that the W/CoFeB bilayers exhibited a two-fold symmetry in their magnetic anisotropy – meaning that the magnetization direction was stable in one plane, but not in another.
The team also observed that the coercivity of the CoFeB film increased with increasing temperature, which is important for its use in storage devices. This means that the film could be used to store data even at high temperatures, making it more suitable for use in applications such as aerospace or automotive industries.
Overall, this study has significant implications for the development of more efficient and compact storage devices. The addition of a W layer to CoFeB thin films could lead to the creation of new magnetic storage technologies that are smaller, faster, and more reliable than current devices.
The researchers’ findings also highlight the importance of understanding the behavior of thin films at the nanoscale. By studying the interactions between different materials at this scale, scientists can gain a deeper understanding of how they behave and how they can be used to create new technologies.
In addition, this study demonstrates the potential for collaborative research between scientists from different countries. The team’s findings were made possible through a partnership between researchers in Chile and India, highlighting the importance of international collaboration in advancing scientific knowledge.
Cite this article: “Breakthrough in Magnetic Thin Films Could Lead to More Efficient Storage Devices”, The Science Archive, 2025.
Thin Films, Magnetic Properties, Coercivity, Cofeb, Tungsten, Storage Devices, Hard Drives, Sputtering, Annealing, Magnetometry
