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http://dx.doi.org/10.4283/JKMS.2011.21.6.225

Development of Exchange-coupling Magnets Using Soft/hard Nanoparticles  

Kim, Jong-Ryoul (Department of Metallurgy and Materials Engineering, Hanyang University)
Cho, Sang-Geun (Department of Metallurgy and Materials Engineering, Hanyang University)
Jeon, Kwang-Won (Department of Metallurgy and Materials Engineering, Hanyang University)
Publication Information
Journal of the Korean Magnetics Society / v.21, no.6, 2011 , pp. 225-230 More about this Journal
Abstract
Magnetic materials has been applied to various fields due to their energy convertible properties between electrical and mechanical energy. Particularly, permanent magnets have been currently attracted much attention because they produce external magnetic field without any electrical current. For high efficiency, a demand for permanent magnets containing rare earth elements has been continuously increased, which abruptly raises the price and causes the supply difficulty of rare earth materials. Therefore, the development of permanent magnets with less or without rare earth elements become a urgent issue. In this report, the current trend and major issues on high efficiency permanent magnets, particularly exchange-coupling magnets, are discussed.
Keywords
exchange-coupling; permanent magnet; rare-earth materials; nano-composite;
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