Abstract
The solid-state synthesis method was used to prepare polycrystalline samples of NdFeO3. The effect of dc bias was observed on the dielectric properties of prepared NdFeO3 samples. Impedance was found to be comprised of three contributions corresponding to grains, grain boundaries, and sample-electrode contact. Temperature and frequency-dependent dielectric measurements revealed that the sample electrode contact and grain boundary responses get modified, while grain response remains unaltered under dc bias. Large dielectric permittivity (of the order of ∼103) in the entire studied temperature range (100 K–450 K) and at high frequencies (∼5 MHz) was found to remain unaffected under dc bias, suggesting that the large dielectric constant is an intrinsic property of NdFeO3.
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