Enhancement of GHz electromagnetic wave absorption characteristics in aligned M-type barium ferrite Ba1-xLaxZn xFe12-x-y(Me0.5Mn0.5) yO19 (x = 0.0-0.5; y = 1.0-3.0, Me: Zr, Sn) by metal substitution

T. Kagotani, D. Fujiwara, S. Sugimoto, K. Inomata, M. Homma

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Abstract

The resonance absorption properties depend on the complex permeability μ = μ′ - jμ″, particularly μ″ = Ms/2H and x of substitution amount for Ba and y of that one for Fe on the absorption properties of Ba ferrite compound. The c-axis aligned Zr-substituted samples (x = 0.0, y = 1.4) showed Ms = 76μWm/kg, HA = 0.21 MA/m, and μ′ = 7.2 and μ″ = 7.0. These μ′ and μ″ are significantly larger than those for (TiMn)-substituted samples. Sn or Zr is concluded to be effective in enhancing the absorption characteristics of M-type Ba ferrite absorber.

Original languageEnglish
Pages (from-to)e1813-e1815
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2004 May

Keywords

  • EMI
  • GHz band
  • M-type Ba ferrite
  • Magnetic resonance
  • Microwave absorption

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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