Influence of pinning effects on the ferroelectric hysteresis in cerium-doped Sr 0.61 Ba 0.39 …
2001; American Physical Society; Volume: 63; Issue: 17 Linguagem: Inglês
10.1103/physrevb.63.174101
ISSN1095-3795
AutoresTorsten Granzow, Udo Dörfler, Th. Woike, M. Wöhlecke, R. Pankrath, M. Imlau, W. Kleemann,
Tópico(s)Multiferroics and related materials
ResumoThe temporal behavior of ferroelectric domains under external electric field is investigated in cerium-doped strontium-barium-niobate crystals using quasistatic surface-charge detection. The polarization reversal depends strongly on frequency, temperature, dark conductivity, and doping concentration. This so-called electrical aging is attributed to electric pinning centers that hinder the domain-wall motion. We discuss the existence of pinning centers on the basis of the quenched random-field model.
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