Abstract
The relation between the hysteresis loop area of polycrystalline barium titanate and preliminary sample processing is examined. It is shown that the loop area decreases after prolonged action of a dc electric field at increased temperature. This indicates that the dielectric loss tangent is reduced in a sample subjected to this treatment. It would seem that the presence of a large space charge, accumulated in the sample during its polarization at increased temperature, affects and changes its ferroelectric properties.
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Shamro, Z.A. Influence of preliminary treatment of polycrystalline barium titanate on the shape of its hysteresis loop. Soviet Physics Journal 9, 101–104 (1966). https://doi.org/10.1007/BF00818193
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DOI: https://doi.org/10.1007/BF00818193