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所属单位：[1]Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

发表刊物：JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

关键字：MgO additive; Hexagonal ferrite; High-frequency; Electromagnetic properties

摘要：MgO was introduced into low-temperature sintered Z-type hexaferrites in order to improve their high-frequency electromagnetic properties. In the doped samples the major Z-type phase coexists with a small amount of W-type magnetoplumbite phase. The addition of MgO causes a decrease of the average grain size and an increase of the magnetocrystalline anisotropy (K(1)) and saturation magnetization (M(s)) with the increment of K(1) being larger than that of M(s). These factors result in a reduce of the initial permeability. Also, the samples with MgO additive exhibit higher Q-factor and dc resistivity. Furthermore, the introduction of MgO can decrease the dielectric constant and improve the dielectric loss tangent of the samples by reducing the electronic transition in octahedral site (B-site) between Fe(2+) and Fe(3+) ions. (C) 2010 Elsevier B.V. All rights reserved.

文献类型：Article

卷号：322

期号：14

页面范围：1934-1938

ISSN号：0304-8853

是否译文：否