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Piezoresponse Force Microscopy using Keysight 9500 AFM

Piezoresponse Force Microscopy using Keysight 9500 AFM

Application Notes

Piezoelectricity

Piezoelectricity is defined as the electric charges acquired by certain materials when subjected to mechanical stress. [1,2] It is first discovered in 1880 by French physicists Jacques and Pierre Curie. Typically, a piezoelectric material in its neutral state (without any subjection of stress) has no net charge. The positive and negative charges in the material (or the electric dipole moments in other word) cancel each other out. However, when a force is applied to a piezoelectric material, although the total charges of the material remains unchanged, the stress it placed on the material causes a change in the electric dipole moments where they no longer balance each other out, and a net positive and negative surface charge density are instead created on either side of the material.

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