Magnetodielectric consequences in double perovskite Pr$_{2}$CoMnO$_{6}$

We report an intriguing colossal dielectric and magnetodielectric (MD) response on double perovskite Pr$_{2}$CoMnO$_{6}$(PCMO) system. At the highest applied magnetic field 9T, the giant dielectric constant around $T_{m} \quad \sim $ 175 K is enhanced almost $\sim $ 22{\%} (at 10 kHz frequency) compare with that at zero field. The observed positive MD effect is considered to be associated with the direct consequence of negative magnetoresistance changes ($\sim $ -15{\%} at 175 K). Concomitantly, a pronounced ferromagnetic ordering is observed near $T_{c} \quad \sim $ 175 K coinciding with $T_{m}$ of $\varepsilon \prime (T)$. These experimental results suggest that the magnetoresistive MD response is very much conditioned by magnetic property of PCMO.