Ferro Electricity

Experiment Guide
1.  Ferroelectricity Prelab
1.  Notes part 1
2.  Notes part 2
Related Material
1.  Kittel, Chap. 16, Dielectrics, Ferroelectrics
2.  Feynman, Vol. 2, Lecture 11, Inside Dielectrics
3.  Ashcroft, Mermin,Chap. 27
4.  Omega CN76000 Manual
5.  Keithley 610 Manual
Useful Links
 Video, Why so Few Perovskite Ferroelectrics?








When a material is subject to an external electric field, an electric polarization develops. In ferroelectric materials, a spontaneous polarization exists in the absence of an external electric field below a characteristic Curie temperature Tc. The spontaneous polarization Ps decreases with increasing temperature and vanishes at Tc. In the ferroelectric state the polarization vs. electric field exhibits a hysteresis loop, analogous to the magnetic hysteresis loops found in ferromagnetic materials. In this experiment you will measure Tc, temperature dependence of the dielectric constant and Ps, and the hysteresis loop of ferroelectric triglycine sulfate (TGS).