中国物理B ›› 2021, Vol. 30 ›› Issue (2): 27504-0.doi: 10.1088/1674-1056/abc15c

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  • 收稿日期:2020-08-23 修回日期:2020-09-18 接受日期:2020-10-15 出版日期:2021-01-18 发布日期:2021-01-18

High-frequency magnetic properties and core loss of carbonyl iron composites with easy plane-like structures

Guo-Wu Wang(王国武)1, Chun-Sheng Guo(郭春生)2, Liang Qiao(乔亮)1, Tao Wang(王涛)1,3,†, and Fa-Shen Li(李发伸)   

  1. 1 Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, China; 2 Guangzhou Newlife Magnet Electricity Co., Ltd., Guangzhou 511356, China; 3 Key Laboratory of Special Function Materials and Structure Design (Ministry of Education), Lanzhou University, Lanzhou 730000, China
  • Received:2020-08-23 Revised:2020-09-18 Accepted:2020-10-15 Online:2021-01-18 Published:2021-01-18
  • Contact: †Corresponding author. E-mail: wtao@lzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11574122 and 51731001) and Joint Fund of Equipment Pre-Research and Ministry of Education, China (Grant No. 6141A02033242).

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Abstract: To fully release the potential of wide bandgap (WBG) semiconductors and achieve high energy density and efficiency, a carbonyl iron soft magnetic composite (SMC) with an easy plane-like structure is prepared. Due to this structure, the permeability of the composite increases by 3 times (from 7.5 to 21.5) at 100 MHz compared with to the spherical carbonyl iron SMC, and the permeability changes little at frequencies below 100 MHz. In addition, the natural resonance frequency of the composite shifts to higher frequencies at 1.7 GHz. The total core losses of the composites at 10, 20, and 30 mT are 80.0, 355.3, and 810.7 mW/cm3, respectively, at 500 kHz. Compared with the spherical carbonyl iron SMC, the core loss at 500 kHz is reduced by more than 60%. Therefore, this kind of soft magnetic composite with an easy plane-like structure is a good candidate for unlocking the potential of WBG semiconductors and developing the next-generation power electronics.

Key words: soft magnetic composite, high frequency magnetic property, power electronic, core loss

中图分类号:  (Saturation moments and magnetic susceptibilities)

  • 75.30.Cr
75.30.Gw (Magnetic anisotropy) 75.40.Gb (Dynamic properties?) 76.20.+q (General theory of resonances and relaxations)