铁氧体(磁铁)
准静态过程
消散
涡流
凝聚态物理
各向异性
材料科学
航程(航空)
磁各向异性
核磁共振
磁畴
磁场
物理
磁化
热力学
光学
复合材料
量子力学
作者
C. Beatrice,F. Fiorillo
标识
DOI:10.1109/tmag.2006.879903
摘要
The magnetic energy losses and their frequency dependence in Mn-Zn ferrites have been investigated in theory and experiment. A novel theoretical approach has been developed, which is based on the concept of loss decomposition and the appraisal of the separate contributions provided by domain wall displacements and moment rotations. It is shown that the role of eddy currents in energy dissipation is a minor one and can be appreciated in the megahertz region only. The loss contribution by domain walls versus frequency is obtained from knowledge of the quasistatic energy loss, whereas the rotational real and imaginary permeabilities are derived as solutions of the Landau-Lifshitz-Gilbert equation for distributed values of the effective anisotropy field. The model successfully applies to results obtained on commercial ferrite ring samples
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