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The Effects of Mo Partial Substitution at the Mn Site on Electroresistance Behaviour in La0.7Ba0.3Mn1−xMoxO3 (x = 0, 0.01, 0.02, 0.03, 0.04) Manganites

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Abstract

In this study, the structural, electrical, and magnetic properties and electroresistance (ER) effects in La0.7Ba0.3Mn1−xMoxO3 (x = 0–0.04) prepared using the solid-state method have been studied. All samples exhibited a metallic to insulating behaviour accompanied by ferromagnetic properties. Mo substitution increased resistivity under an applied current of 10 mA while the higher applied current of 20 mA reduced the resistivity and led to the ER effect. Mo-substituted samples exhibited almost constant and larger ER values than the x = 0 sample within a temperature range of 30–180 K, which may be due to the presence of dual double-exchange interactions of Mn2+-O-Mn3+ and Mn3+-O-Mn4+ along with the formation of more conductive paths in the metallic region. Meanwhile, the Mo-substituted samples exhibited a reduction in the ER effect in the insulating region which was probably due to the strong localization of charge carriers. The result was attributed to the induction of Mn2+ which may contribute to the lattice distortion effect and thus enhanced electron-lattice attraction in the Mo-substituted samples.

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Acknowledgements

We would like to express our gratitude for the financial support provided by the Malaysian Ministry of Higher Education (MOHE) and the Faculty of Applied Sciences (FSG), Universiti Teknologi MARA through the Fundamental Research Grant Scheme (FRGS) (600-IRMI/FRGS 5/3 (330/2019).

Funding

Funding was provided by Malaysian Ministry of Higher Education, 600-IRMI/FRGS 5/3 (330/2019), Norazila Ibrahim.

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Authors and Affiliations

  1. Faculty of Applied Sciences, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia

    N. Ibrahim, M. S. Sazali & Z. Mohamed

  2. Faculty of Applied Sciences, Universiti Teknologi MARA, Cawangan Perlis, Kampus Arau, 02600, Arau, Perlis, Malaysia

    R. Rozilah

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Ibrahim, N., Sazali, M.S., Mohamed, Z. et al. The Effects of Mo Partial Substitution at the Mn Site on Electroresistance Behaviour in La0.7Ba0.3Mn1−xMoxO3 (x = 0, 0.01, 0.02, 0.03, 0.04) Manganites. J. Electron. Mater. 52, 237–250 (2023). https://doi.org/10.1007/s11664-022-09976-y

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