Hey Everyone!
I am performing a comparative study of different piezoelectric semiconductors (GaAs, GaN, In2O3), for their properties of Polarization (vs Electric Field), and Strain Tensor (vs Electric Field). For my study, I am using COMSOL Multiphysics as my simulation tool, but I am getting overlapping curves. I am not sure if this study and result of mine are correct or not? and what is the reason for such overlapping curves?
What you have is hysterezis. The electric field is linear with the strain (and polarisation) until some value, then the electric field remains approximatively constant, when all the polarisation vectors inside the material are parallel (all the molecules of the material are polarized in the same direction).
The curves overlap because the hysterezis is an intrisic property of the material (at some electric field the polarisation remains almost constant with increasing field, that is all the molecules' polarisation vectors are oriented parallel).
Polarizasyon olayında oluşan negatif alan kadar pozitif alan vardır. Aynı durumun tersi de olabilir. Oluşan pozitif alan kadar negatif alan vardır. Her iki durumda da simetrik oluşum söz konusudur. Oluşan Polarizasyon alan kadar depolarizasyon alan oluşur.
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