In a system containing rare earth, I have doped divalent Sr replacing trivalent rare-earth element. With doping I found a decreases in grain size, decrease in dielectric constant at low frequency and increase in dielectric loss. What could be the possible reason?
Emanuel Cooper
The increase in dielectric loss is probably due to the generation of oxygen vacancies, which increases ionic conductivity by oxide ions.
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Darel Kond Ngue
Structural defects caused by the substitution of a trivalent element by a divalent element can affect the dielectric properties including the dielectric constant and dielectric losses. It would also be important to take into account the size difference of the substituted elements.
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