| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1867608 | Physics Letters A | 2009 | 4 Pages |
Abstract
Dielectric relaxations of Tb0.91Yb1.38Bi0.71Fe5O12 ceramics were investigated. A Debye-type relaxation was observed in the temperature range of 125–620 K with an activation energy of 0.29 eV. This activation energy agreed well with that of carriers hopping between Fe2+ and Fe3+, indicating that this relaxation might be a dipolar-type relaxation associated with the hopping carries. A high relaxorlike dielectric peak with a very strong frequency dispersion in the high temperature range of 400–620 K might be originate from the oxygen vacancies related dielectric relaxation.
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Authors
Y.J. Wu, Y. Gao, X.M. Chen, S.Y. Wu, Z.C. Xu,