外部和内部因素对纳米晶合金kHz级饱和磁化过程影响的微磁学分析

doi:10.19595/j.cnki.1000-6753.tces.L80436

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Abstract The mathematical modeling problem of nanocrystalline alloy under kHz level complex high frequency saturation condition is becoming more and more serious due to the lack of fundamental research. In this paper, a three-dimensional spherical mesoscopic model of nanocrystalline alloy (Fe_73.5Cu₁Nb₃Si_13.5B₉) was established by micromagnetic simulation software OOMMF. The calculated static magnetic characteristic parameters of the model are in good agreement with the experimental results, which validates the correctness of the model. The angular velocity of magnetic moment rotation ω was utilized to indicate the precession of magnetic moment in the process of saturation magnetization. Dynamic saturation and static saturation were both defined quantitatively. Then, the influence mechanism of different changes of external factors (accessional DC bias magnetic field B_d and magnetization frequency f ) and internal factor (grain size d) on saturation magnetization process was investigated. The results indicate that the influence of external and internal factors is different. For external factors, under dynamic saturation conditions, increasing B_d or f both are the effective measures for accelerating magnetic moment rotation, and the effect of increasing B_d is more obvious; under static saturation conditions, increasing B_d or f can no longer accelerate the rotation of the magnetic moment because the nanocrystalline alloy has reached the maximum magnetization speed at that moment. For internal factor, whether under dynamic or static saturation conditions, reducing the grain size will increase the angular moment of magnetic moment rotation of the nanocrystalline alloy, which can accelerate the magnetization process of the nanocrystalline alloy material.

Key words： Nanocrystalline alloy micromagnetic simulation saturation magnetization process magnetic moment rotation magnetization frequency DC bias magnetic field grain size

Received: 01 July 2018 Published: 05 May 2019

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TM274

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	Han Zhiyun
	Zou Liang
	Wu Jiale
	Zhang Li
	Zhao Tong

Cite this article:

Han Zhiyun,Zou Liang,Wu Jiale等. Micromagnetic Analysis of External and Internal Impact Factors on kHz Level Saturation Magnetization for Nanocrystalline Alloy[J]. Transactions of China Electrotechnical Society, 2019, 34(8): 1589-1598.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80436 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I8/1589

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