Abstract
The induction thermal plasma （ITP） process can synthesize nanoparticles of the order of 50-100 nm from the gas phase using
its high-temperature reaction field. In order to obtain a permanent magnet with high properties, especially high coercivity, the fine
grain size of about 100 nm is favorable. Fortunately, the nanoparticle size that the ITP process can prepare is optimal for unlocking
the potential of permanent magnet compounds. Therefore, in this paper, we introduce the fabrication process of permanent magnet
compounds, rare earth （R）-transition metals （TM）, currently reported, and describe the synthesis of R-TM nanoparticles by
the ITP process, which we have been working on recently. Numerical calculation of nanoparticle formation is also included, and
the results of considering nanoparticles obtained from both experiments and calculations are also described. Finally, the future
development of this ITP process is also discussed.
