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Large-field dielectric loss in relaxor ferroelectric PLZT
Ist Teil von
Smart materials and structures, 2014-03, Vol.23 (3), p.35007
Ort / Verlag
Bristol: IOP Publishing
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Lead zirconate titanate ceramics are often used at unipolar drive field levels approaching or exceeding the coercive field, yet dielectric losses are characterized by a loss tangent measured at a significantly lower drive field. As the magnitude of the drive field is increased the energy dissipation can increase significantly over that predicted by the low-field loss tangent. This experimental study addresses the effects of temperature and bias stress on large-field dielectric loss in lanthanum-doped lead zirconate titanate, Pb0.92La0.08(Zr0.65Ti0.35)0.98O3 (PLZT 8/65/35). Large-field dielectric loss was experimentally determined by measuring the area within a unipolar electric displacement-electric field hysteresis loop. The results show the effects of saturation on the effective loss tangent.