Tripathy, Satya N and Pradhan, Dhiren K and Mishra, Karuna K and Sen, Shrabanee and Palai, Ratnakar and Paulch, Marian and Scott, James F and Katiyar, Ram S and Pradhan, Dillip K (2015) Phase transition and enhanced magneto-dielectric response in BiFeO3-DyMnO3 multiferroics. Journal of Applied Physics, 117 (14). Article No-144103. ISSN 0021-8979

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We report systematic studies on crystal structure and magneto-dielectric properties of (1 - x) BiFeO3-x DyMnO3 (0.0 <= x <= 0.2) nanoceramics synthesized by auto-combustion method. Rietveld refinement of X-ray diffraction data indicates a structural transition from R3c to R3c + Pn2(1)a at x = 0.1. Field emission scanning electron micrographs display a decrease in grain size with increase in x. The presence of dielectric anomalies around antiferromagnetic transition temperature implies the magnetoelectric coupling. Dielectric measurements showed decrease in magnetic ordering temperature with increasing x in agreement with differential scanning calorimetry results. A significant increase in magnetization has been found with increasing DyMnO3 substitution. Magneto-impedance spectroscopy reveals a significant change (similar to 18%) in dielectric permittivity at H = 2T for x = 0.2. (C) 2015 AIP Publishing LLC.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 08 Jan 2016 09:02
Last Modified: 08 Jan 2016 09:02

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