When I do PFM analysis the hysteresis(butterfly) loop is not complete and symmetric. what's the reason and how I can have a symmetric hysteresis loop?

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Marc Rippen

Matrix interference?

Sreenidhi P R

Hi Muhammed,

I am not so experienced in this field. But I have heard the voltage bias range should be high voltage ie >10V to get the loop complete. Regarding the asymmetry you can check in this paper

This paper says about the asymmetry of electrical contact during PFM as the reason for asymmetry

Piezoelectricity and electrostriction in biocompatible (Na,K)NbO3 nanofiber

scaffolds

A. Jalalian1 and A. M. Grishin1,2,3,a)