Correlating structure, magnetism, and electrical transport in sol-gel processed Nd0.55Ca0.45MnO3 manganite

Correlating structure, magnetism, and electrical transport in sol-gel processed Nd0.55Ca0.45MnO3 manganite

This study explores the synthesis and comprehensive analysis of nanocrystalline Nd0.55Ca0.45MnO3 (NCMO-11) to elucidate the influence of nano-size on its multifunctional properties. The sol-gel method synthesized NCMO-11, which exhibited a well-defined orthorhombic perovskite structure with notable...

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Bibliographic Details
Main Authors: Gaurav Joshi, Hira Ilyas, Sudha Tomar, Shivam Kumar Miglani, Yogesh Kumar, Upendra Kumar, D.S. Raghav
Format: Article
Language:English
Published: Elsevier 2025-01-01
Series:Next Nanotechnology
Subjects:
Nanocrystalline
Sol-gel
Rietveld Refinement
Manganite
Ferromagnetic
Insulator-metal Transition
Online Access:http://www.sciencedirect.com/science/article/pii/S294982952500110X
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Summary:This study explores the synthesis and comprehensive analysis of nanocrystalline Nd0.55Ca0.45MnO3 (NCMO-11) to elucidate the influence of nano-size on its multifunctional properties. The sol-gel method synthesized NCMO-11, which exhibited a well-defined orthorhombic perovskite structure with notable Jahn-Teller distortions. Morphological studies revealed agglomerated granules with an average particle size of ∼81 nm. Magnetic measurements highlighted a complex interplay of antiferromagnetic and ferromagnetic phases, characterized by a charge-ordering transition at TCO∼233 K and ferromagnetic ordering at TCON∼149 K. Transport studies indicated an insulator-metal transition (IMT) around TIMT∼98 K during cooling, accompanied by thermal hysteresis, suggesting strong phase competition. Dielectric studies revealed exceptionally high dielectric constants at low frequencies, attributable to interfacial polarization, while optical analyses showed a wide bandgap of 4.07 eV, emphasizing the material's potential in UV-responsive technologies. These findings underscore the critical impact of nanoscale effects on the structural, magnetic, transport, and optical behavior of NCMO-11, establishing its suitability for advanced applications in electronics, magnetics, and optoelectronics.
ISSN:2949-8295

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