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Erschienen in: Journal of Electronic Materials 12/2023

08.10.2023 | Original Research Article

Effect of Grain Size on Resistivity and Voltage-Dependent Dynamic Conductance in Nano-crystalline Nd\(_{0.6}\)Sr\(_{0.4}\)CoO\(_3\)

verfasst von: Pritish Paul, Arindam Midya, Subal Chandra De, Moumita Patra

Erschienen in: Journal of Electronic Materials | Ausgabe 12/2023

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Abstract

The resistivity behaviour and voltage-dependent dynamic conductance of Nd\(_{0.6}\)Sr\(_{0.4}\)CoO\(_3\) nanomaterials were studied with respect to two different grain sizes (\(\sim \) 55 nm and \(\sim \) 140 nm). Three distinct regions were observed in the temperature-dependent resistivity (\(\rho -T\)) graph. An upturn in the\(\rho -T\) curve was observed below 100 K, which was enhanced with decreasing grain size. This enhancement was investigated, and the analysis suggests that electron–electron interaction plays a key role. We probed the transport mechanism using the isothermal current–voltage (I–V) characteristics. Non-linear dynamic conductance was found for both samples. A temperature-dependent non-linear exponent suggests three types of current transport mechanisms. A voltage-driven crossover from inelastic tunnelling via localized states to direct elastic tunnelling through the grain boundary was observed around the critical region for metal insulator transition.

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Metadaten
Titel
Effect of Grain Size on Resistivity and Voltage-Dependent Dynamic Conductance in Nano-crystalline NdSrCoO
verfasst von
Pritish Paul
Arindam Midya
Subal Chandra De
Moumita Patra
Publikationsdatum
08.10.2023
Verlag
Springer US
Erschienen in
Journal of Electronic Materials / Ausgabe 12/2023
Print ISSN: 0361-5235
Elektronische ISSN: 1543-186X
DOI
https://doi.org/10.1007/s11664-023-10751-w

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