Title : Oxygen vacancies based modifications in properties of Sr doped Nd2NiMnO6
In this paper we have discussed about the structural and dielectric properties of Sr doped Nd2NiMnO6. There is no effect on the structure of compound Nd2NiMnO6 if doped upto the Sr concentration of x=0.3 in Nd2-xSrxNiMnO6 and the observed structure is monoclinic indexed with P21/n space group. Raman spectroscopy depicts the existence of disorder in the samples due to Sr doping and a rise in disorder with increase in concentration of Sr has been observed. All samples have a mixed valence of Ni2+, Ni3+, Mn2+, Mn3+ and Mn4+ associated with oxygen vacancies. Dielectric studies on all the samples show a decrease in dielectric constant as well as dielectric loss with increase in frequency, the usual behavior of polar dielectrics. The temperature effect on the dielectric properties shows an increase with increase in temperature. Conductivity and impedance studies have been investigated for all the three samples of Nd2-xSrxNiMnO6 (x=0.0, 0.1, 0.3) and the results obtained are inter-related with each other.
Audience take away:
- In this talk I will talk about the dielectric properties of oxide double perovskite and their modifications by doping and creating defects.
- By doping the dielectric constant increases and thus the doped compound becomes a potential candidate for energy storage devices
- Researchers can modify this material either by doping with other dopant or depositing thin films of same compound