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Magnetization, magnetoresistance, and magnetodielectric measurements havebeen carried out on the half doped charge ordered manganite, Pr_0.5Ca_0.5MnO_3.The low temperature state is found to be strongly dependent on the oxygenstoichiometry whereas the high temperature state remains almost unaltered. Adisorder driven phase separation in the low temperature state is noticed in themagnetic, magnetoresistance, and dielectric measurements which is attributed tothe oxygen deficiency in the compound. A considerable magnetodielectric (MD)effect is noticed close to room temperature at 280 K which is fascinating fortechnological applications. The strongest MD effect observed in between 180 Kand 200 K is found to be uncorrelated with magnetoresistance but it issuggested to be due to a number of intricate processes occuring in thistemperature range which includes paramagnetic to antiferromagnetic transition,incommensurate to commensurate charge ordering and orbital ordering. Thestrongest MD effect seems to emerge from the high sensitivity of theincommensurate state to the external perturbation such as external magneticfield. The results propose the possible magnetoelectric coupling in the chargeordered compound.

Possible magnetoelectric coupling in the half doped charge ordered manganite, Pr_0.5Ca_0.5MnO_3-d