Fujitsu, in collaboration with the Japan Institute of Materials and Materials Research, has developed a groundbreaking technology that uses the supercomputer "K" to simulate large-scale magnetization reversal in magnetic materials. Magnetization reversal occurs when the direction of magnetization in a material changes under the influence of an external magnetic field or electric current. This is the first time such a comprehensive simulation of the reverse magnetization process in permanent magnets has been achieved worldwide.
Previously, the industry had explored the reverse magnetization process, but simulating strong neodymium magnets required immense computational power, making it extremely challenging. To overcome this, Fujitsu integrated micromagnetic analysis—used to study the microscopic magnetization state at the atomic level—with the finite element method. This allowed them to create a detailed neodymium magnet model divided into 1 nm regions. The massive computations were handled by the supercomputer "K," enabling a successful simulation of the magnetization reversal.
This new technology allows for a deeper understanding of complex magnetic structures that traditional simulations couldn't handle. It opens up possibilities for developing advanced magnetic materials, such as neodymium magnets without heavy rare earth elements like dysprosium. (Reporter: Enohara Hiroyuki, "Nikkei Manufacturing")
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