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 language | English |
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Pages (from-to) | 4097-4103 |
Number of pages | 7 |
Journal | Ceramics International |
Volume | 38 |
Issue number | 5 |
DOIs | |
Publication status | Published - 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