Dielectric and magnetic properties of (Zn, Co) co-doped SnO2 nanoparticles |
The frequency dependence of the relative dielectric constant ( ε r) at room temperature for both the pure and (Zn, Co) co-doping SnO2 samples. The inset is the Co doping concentration dependence of the dielectric constant measured at 40 Hz, and room temperature. |