High permeability and bimodal resonance structure of flaky soft magnetic composite materials
Liu Xi1, †, Wu Peng1, Wang Peng2, Wang Tao2, Qiao Liang2, Li Fa-Shen2
       

Flake carbonyl iron thickness variations with ball-milling time, showing microstructures of the carbonyl iron under SEM after ball grinding for 4 h (a), 6 h (b), 8 h (c), 9 h (d), 10 h (e), 11 h (f), and 12 h (g), respectively.