Fujitsu unveils new technology for simulating magnetization reversal
Sep 13, 2013 (MarketLine via COMTEX) --
Fujitsu, a provider of technology products, solutions and services, has announced the development of a new technology for simulating magnetization reversal, and has used the K computer to perform huge calculations to conduct the world's first simulation of the magnetization-reversal process in a permanent magnet.
According to the company, this opens up new possibilities in the manufacture of electric motors, generators and other devices without relying on heavy rare earth elements.
Fujitsu has reportedly developed a magnetic simulation technology that combines a finite-element method with micromagnetics. This technology makes it possible to compute magnetization processes of magnetic materials with complex microstructures on a nanometer (nm) scale, which is many times smaller than conventional technology can manage, by executing enormous computations on a supercomputer using a massively parallel computing technique.
This combination technology paves the way toward R&D advances in new magnetic materials, including strong magnets free from heavy rare earth elements. Simulations of magnetization reversal in rare-earth magnets using this technology were performed on the K computer in cooperation with Japan's National Institute for Materials Science (NIMS), the company said.
This newly developed technology will be used to simulate the magnetization reversal of rare-earth magnets. Using a polycrystalline model of a rare-earth magnet, the model is divided into extremely small regions of 1 nm. In so doing, it is possible to calculate the behavior of magnetic transition regions called domain walls. This simulation can also analyze the movement of domain walls and the propagation of magnetization reversals, which is difficult to perform with other simulation technologies, the company reported.
In collaboration with the Elements Strategy Initiative Center for Magnetic Materials (ESICMM) at NIMS (supported by the Japanese Ministry of Education, Culture, Sports, Science, and Technology's "elements strategy project"), Fujitsu will perform ultra-large-scale computations on the K computer and develop a "multi-scale magnetic simulator" that brings micromagnetics together with material design based on first-principle electronic structure calculations, the company added.
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