Transport and semiconducting behavior of Ca2BiNbO6new inorganic double perovskite

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2021-12, Vol.127 (12), Article 950
• Main Authors: Panda, Anita Kumari, Sahoo, Lutu, Chakravarty, Rimpi, Nayak, Nimai C., Parida, R. K., Parida, B. N., Dutta, Rupjyoti
• Format: Article
• Language: English
• Subjects: Applied physics; Characterization and Evaluation of Materials; Condensed Matter Physics; Ferroelectricity; Lead free; Machines; Manufacturing; Materials science; Nanotechnology; Optical and Electronic Materials; Perovskite structure; Perovskites; Physics; Physics and Astronomy; Processes; Room temperature; Surfaces and Interfaces; Temperature; Thin Films; Transition temperature
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-021-05105-4

A lead free polycrystalline double perovskite-based ceramic oxide Ca 2 BiNbO 6 (CBNO) was synthesized by the conventional solid state reaction route. Emergence of a new single-phase double perovskite structure exhibiting cubic phase with space group fm-3 m was confirmed through the room temperature XRD analysis. Particle size of 34.29 nm was obtained using Scherrer’s formula. Different electrical parameters such as complex impedances, modulus, dielectric (ε r and tanδ) and conductivity were recorded carefully by the LCR analyzer for a wide range of temperatures (25–500 ø°C) and frequencies (100 Hz–5 MHz), respectively. Large room temperature dielectric constant with a NTCR property was investigated. The ferroelectric nature with a transition temperature above 300 °C was analyzed from the study. The thermal dependent conductivity fitted curve satisfies the Arrhenius law and leads to a calculated activation energy of 0.0597 eV. The obtained result promotes this new material to be a favorable candidate to uses in smart and modern electronic device applications.