Title :
High-Frequency Magnetic Properties Fe–Hf–B–O Ribbons With Chromium Additive
Author :
Wang, Y.K. ; Zhou, Y. ; Zhai, Y. ; Xiao, J.Q.
Author_Institution :
Dept. of Phys., Southeast Univ., Nanjing, China
Abstract :
Large permeability, low core loss, and high-saturation magnetization are the important parameters for the applications of soft magnetic materials in high-frequency power electronics. By introducing Cr as oxygen-retardant agent in FeHfB melt-spun ribbons and annealing samples in an ultralow partial oxygen pressure environment, we have successfully prevented oxidation of Fe in forming FeCrHfO composites with exchange coupled Fe nanograins. A coercivity of 0.56 Oe and a saturation magnetic flux density of 1.33 T have been achieved in exchange coupled samples. The samples show a high permeability of 250 at 10 MHz.
Keywords :
annealing; boron alloys; chromium alloys; hafnium alloys; iron alloys; magnetic flux; magnetic permeability; nanomagnetics; nanostructured materials; Fe-Hf-B-O ribbons; FeHfBOCr; annealing; chromium additive; exchange coupled nanograins; frequency 10 MHz; high-frequency magnetic properties; magnetic permeability; oxygen-retardant agent; saturation magnetic flux density; ultralow partial oxygen pressure; Annealing; Conductivity; Iron; Oxidation; Permeability; Saturation magnetization; Soft magnetic materials; Exchange coupling; FeHfCrB ribbon; exchange coupling; high frequency; high permeability; soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2438025
