Abstract
The variation of dynamic coercivity, core loss, permeability (μ′), and relaxation behavior with annealing temperature, frequency as well as magnetic field magnitude (Hm) for the FeSiBC amorphous alloy was systematically studied. It can be found that the dynamic coercivity (Hcd) of 6.2 A/m at 1.0 T and 50 Hz is much larger than the static coercivity (Hcs) of 1.7 A/m for the optimally annealed Fe78Si8B13C1 alloy. The increase of Hcd with the increases in frequency can be ascribed to the difficulty of domain wall motion and magnetization rotation as frequency elevates. The dynamic magnetization analysis reveals that μ′ goes up and attains a peak value as Hm increases to about 25 A/m in the low frequency range, while the μ′ does not depend on Hm in the high frequency range (f > 10 kHz). In addition, the change of magnetic relaxation time with annealing temperature and filed magnitude is discussed.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFB0300500), the National Natural Science Foundation of China (Grant Nos. 51801224, 51771083, 51701136), the Zhejiang Provincial Natural Science Foundation (Grant No. LQ18E010006), the Ningbo Municipal Natural Science Foundation (Grant No. 2018A610172), and Science and Technology Service Network Initiative (Grant No. KFJ-STS-SCYD-220).
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He, A., Xiao, H., Dong, Y. et al. Magnetic softness, dynamic magnetization, and relaxation behavior of FeSiBC amorphous alloys. J Mater Sci: Mater Electron 31, 4261–4270 (2020). https://doi.org/10.1007/s10854-020-02979-7
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DOI: https://doi.org/10.1007/s10854-020-02979-7