How can the stereochemical activity of a Lone Pair Electrons influence the Transition temperature (Tc) and Ferroelectricity of our material?

Mohammadreza Khodabakhsh @Mohammadreza-Khodabakhsh

09 February 2014 0 8K Report

Upon doping of some elements in materials like BiFeO3 we see dramatic change in Ferroelectric properties of our material, like reduction in Transition Temperature. If we say that Bismuth has "6s2" lone pair, How can we explain that Tc reduction by stereochemical activity of Lone Pair ? Does this "Lone pair" have the ability to impact on volume distortion in our structure?

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