Brahma, P. ; Banerjee, S. ; Chakraborty, S. ; Chakravorty, D. (2000) Small polaron and bipolaron transport in antimony oxide doped barium hexaferrites Journal of Applied Physics, 88 (11). pp. 6526-6528. ISSN 0021-8979
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Official URL: http://link.aip.org/link/?JAPIAU/88/6526/1
Related URL: http://dx.doi.org/10.1063/1.1309045
Abstract
Direct current electrical resistivity measurements on specimens with composition BaO (6-x) Fe2O3, x Sb2O3 with x having values of 0.0, 0.025, 0.05, 0.1, and 0.3, respectively, were carried out in the temperature range of 120-300 K. Chemical analyses showed the presence of Sb3+ and Sb5+ ions as well as Fe2+ and Fe3+ ions in the doped specimens. The doped specimens were found to have reduced resistivities. The analysis of the data shows that the electrical conductivity in this system arises due to a combined contribution of both small polaron hopping between Fe2+ and Fe3+ sites and bipolaronic transport between Sb3+ and Sb5+ sites.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Barium Compounds; Ferrites; Antimony; Electrical Resistivity; Small Polaron Conduction; Hopping Conduction; Bipolarons; Mixed Valence Compounds; Semiconductor Materials |
| ID Code: | 65033 |
| Deposited On: | 15 Oct 2011 12:15 |
| Last Modified: | 15 Oct 2011 12:15 |
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