1. Effect of holmium on the magnetic and electrical properties of barium based W-type hexagonal ferrites
- Author
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Aen, Faiza, Niazi, Shahida B., Islam, M.U., Ahmad, Mukhtar, and Rana, M.U.
- Subjects
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HOLMIUM , *BARIUM , *FERRITES , *MAGNETIC properties , *ELECTRIC properties of metals , *ANNEALING of metals , *TEMPERATURE effect , *X-ray diffraction - Abstract
Abstract: A series of BaHo x Fe16−x O27 (x =0.0, 0.2, 0.4, 0.6, 0.8, 1.0) W-type hexagonal ferrites were prepared by co-precipitation technique at high annealing temperature of 1320°C. XRD reveals single W-type hexagonal phase in these ferrites. The grain size is measured by SEM analysis using line intercept method. Saturation magnetization, retentivity and coercivity were measured from MH-loops taken on VSM. It was observed that magnetization increases with the increase of Ho content due to difference in ionic radii of Ho3+ (0.901Å) and Fe3+ (0.67Å) ions. Room temperature dc resistivity increases as a function of Ho3+ that may be due to separation between grains. The dc electrical resistivity decreases as a function of temperature which indicates the semi-conducting behavior of the samples. [Copyright &y& Elsevier]
- Published
- 2011
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