Abstract
We report dielectric and pyroelectric responses of solid solutions of Ga2–xFexO3 (x = 0.75, 1.0, and 1.25), exhibiting combined relaxations (Maxwell-Wagner type relaxation and Debye relaxation); however, the dominating contribution is found to be from extrinsic Maxwell-Wagner type relaxation. Furthermore, the emergence of polarization in these systems is understood in terms of the thermally stimulated depolarization current effect caused by freezing of defect dipoles associated with charged oxygen vacancies rather than the intrinsic ferroelectric behavior.
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