Jpn. J. Appl. Phys. 46 (2007) pp. L477-L479 |Next Article| |Table of Contents|
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New High-Bs Fe-Based Nanocrystalline Soft Magnetic Alloys
Advanced Electronics Research Laboratory, Hitachi Metals, Ltd., 5200 Mikajiri, Kumagaya, Saitama 360-0843, Japan
(Received March 27, 2007; accepted March 29, 2007; published online May 18, 2007)
The magnetic properties and microstructures of newly developed Fe–Cu–B and Fe–Cu–Si–B alloys produced by melt-spinning have been studied. The annealed alloys consist of nanoscale grains. The annealed alloys show a high-saturation magnetic flux density Bs of more than 1.8 T and excellent soft magnetic properties such as a low core loss of about 0.3 W/kg at 50 Hz and 1.5 T (P15/50). For the present alloys, the addition of Cu is effective for the formation of nanoscale grains and the improvement of the soft magnetic properties.
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