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Effect of holmium on the magnetic and electrical properties of barium based W-type hexagonal ferrites
- Source :
-
Ceramics International . Aug2011, Vol. 37 Issue 6, p1725-1729. 5p. - Publication Year :
- 2011
-
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]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 37
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 60789983
- Full Text :
- https://doi.org/10.1016/j.ceramint.2010.10.006