Morpho-Structural, Electrical and Magnetic Behavior of Chemically Synthesized Multiferroic GdMnO3 Ceramic
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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Field Emission Scanning Electron Microscope;
Document Type: Research Article
Department of Physics, College of Engineering, Bhubaneswar 751024, Odisha, India
Department of Physics, Faculty of Engineering and Technology (ITER), Siksha ‘O’ Anusandhan (Deemed to Be University), Bhubaneswar 751030, Odisha, India
Institute of Materials Science, Planetarium Building, Bhubaneswar 751013, Odisha, India
Publication date: April 1, 2020
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