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Morpho-Structural, Electrical and Magnetic Behavior of Chemically Synthesized Multiferroic GdMnO3 Ceramic

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The observations of room temperature ferroelectricity and ferromagnetism for GdMnO3 (GMO) ceramics have been reported in this paper. The nanocrystalline GMO powder was synthesized by chemical route and then sintered in the form of bulk pellet at 850 °C for 24 h by following slow step sintering schedule. Bulk GMO sample is observed to be polycrystalline in nature having orthorhombic perovskite structure and Pbnm space group. Well connected grains are observed with higher percentage of porosity in the micrographs obtained from field emission scanning electron microscope. The dielectric anomaly has been observed for the sintered sample at 338 K and a wide ferroelectric hysteresis loop has also been observed at room temperature. Room temperature dielectric constant (ε) value of the sample is high (~2736) at the frequency of 100 Hz. The zero field cooled (ZFC) and field cooled (FC) magnetizations shows the antiferromagnetic behavior around 12 K. Sample shows a weak ferromagnetic behavior at 3 K.
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Keywords: Chemical Route; Dielectric Constant; Ferroelectricity; Ferromagnetic; Field Emission Scanning Electron Microscope; Nanocrystalline

Document Type: Research Article

Affiliations: 1: Department of Physics, College of Engineering, Bhubaneswar 751024, Odisha, India 2: Department of Physics, Faculty of Engineering and Technology (ITER), Siksha ‘O’ Anusandhan (Deemed to Be University), Bhubaneswar 751030, Odisha, India 3: Institute of Materials Science, Planetarium Building, Bhubaneswar 751013, Odisha, India

Publication date: April 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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