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首页> 外文期刊>The European physical journal. Applied physics >Study of microwave absorptions in M-hexaferrites for anti-radar applications
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Study of microwave absorptions in M-hexaferrites for anti-radar applications

机译：用于抗雷达应用的M-六价铁氧体中微波吸收的研究

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摘要

Microwave absorption of sintered M-type hexaferrites (BaFe_(12-2x)Ru_xZn_xO_(19)) is investigated as a function of the substitutio ratio x, The substitution with Ru and Zn has been shown to reduce the axial anisotropy of the BaM-hexaferrite which becomes in-plane for x approx= 0.4. Large saturation magnetization and in-plane magnetic anisotropy allow to obtain high permeability values at microwave frequencies. To study the behavior of the ferrites at these frequencies, the complex constitutive parameters #epsilon# and #mu# (respectively permittivity and permeability) are simultaneously measured from 0.5 up to 18 Ghz using a coaxial technique. Two absorption phenomena are observed: the ferrimagnetic resonance and the domain wall relaxation; the latter is studied with the Globus' model. Anti-radar applications are also mentioned.
机译：研究了烧结M型六方铁氧体（BaFe_（12-2x）Ru_xZn_xO_（19））的微波吸收与取代比x的关系，用Ru和Zn取代可降低BaM-六方铁氧体的轴向各向异性对于x大约= 0.4，它变为面内。大的饱和磁化强度和面内磁各向异性允许在微波频率下获得高磁导率值。为了研究铁氧体在这些频率下的行为，使用同轴技术同时测量了0.5至18 GHz的复本构参数＃epsilon＃和＃mu＃（分别为介电常数和磁导率）。观察到两种吸收现象：亚铁磁共振和畴壁弛豫。后者是用Globus模型研究的。还提到了反雷达应用。

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