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Thermoelectric power studies of Sn/Nb substituted Mn-Zn ferrites

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Abstract

Thermoelectric power studies of polycrystalline materials of Sn/Nb substituted Mn-Zn ferrites have been carried out. The Seebeck coefficient, carrier concentration and drift mobility were evaluated. The Seebeck coefficient increases up to 420 K and 400 K for Nb and Sn substituted ferrites respectively. All the ferrites exhibited n-type conduction over the range of temperature studied. At high temperatures, a non-degenerate type of semiconductor behaviour has been observed. The conduction of these materials is explained by hopping of electrons from Fe2+ to Fe3+, in addition to the existence of narrow bands and localized levels. The variation of drift mobility is explained by wavy bands [1, 2].

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  1. A. D. P. Rao
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  2. B. Ramesh
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  3. P. R. M. Rao
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  4. S. B. Raju
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Rao, A.D.P., Ramesh, B., Rao, P.R.M. et al. Thermoelectric power studies of Sn/Nb substituted Mn-Zn ferrites. Journal of Materials Science 34, 621–623 (1999). https://doi.org/10.1023/A:1004571418384

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