Experimental results characteristics specific to each material

Experimental results characteristics specific to each material 

This material is an ionic conductor due to the presence of sodium iorrs. 

It is therefore capable of inducing a polarization process at the electrodes. 

The samples studied appear here as 10 nun diameter sirrtered pellets associated with two gold electrodes and made by cathode sputtering of a 400 nm-thick layer. 

We note the presence of a semidrele, which is characteristic of a RC circuit and can be attributed to the presence of grain boimdaries. When temperatirre increases, the semicircle s diameter is lowered, and conseqrrerrtly the electrical resistance of the material as well. 

---