Ferroelectric Behaviour in PZT Capacitor Dielectrics

A rather rushed video about ferroelectric behaviour of some common capacitor dielectrics at low temperatures.

As a result of some vaguely related work on some fun with magnetic logic I noticed non-linearity in monolithic ceramic capacitors. After a bit of research and experimentation this video talks a bit about my test circuit, why such capacitors are still useful and how one might use the ferroelectric effect they demonstrate for memory.

Errata:

The gain of my buffers is 2 (not unity), the resistors are the same value, so the inverting input gets half the voltage at the output and the output will swing to follow twice the non-inverting input. (Face palm!!)
I probably should have talked about the floating gate of flash and more about RAM and Flash cells in general, but you can read all the fascinating detail elsewhere.
The exact composition of the device dielectric is unknown, I am assuming it is mostly PZT, but manufactures use a great deal of different add-mixture materials to engineer the dielectric for the application. I also tried PZT piezo materials but saw no significant ferroelectric effect regardless of temperature.