Mössbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles

Muhammad Javed Iqbal, Rafaqat Ali Khan, Shigemi Mizukami, Terunobu Miyazaki

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

W-type hexaferrite nanoparticles of nominal composition BaCo 2-xMn xFe 16-2yZr yNi yO 27 (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. Mössbauer analysis reveals that extrinsic substitution of metal ions (Mn x and Zr y-Ni y) takes place at 2d, f IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M s and remanent magnetization M r while these substitutions lower the coercivity H c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g -1, 36.0 emu g -1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.

Original languageEnglish
Pages (from-to)4097-4103
Number of pages7
JournalCeramics International
Volume38
Issue number5
DOIs
Publication statusPublished - 2012 Jul

Keywords

  • A. Powders: chemical preparation
  • C. Magnetic properties
  • D. Ferrites
  • Microwave absorption
  • Mössbauer spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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