Synthesis, structure, optical and magnetic properties of Nd1�xAxMn0.5Co0.5O3�δ (A = Ba, Sr and Ca; x = 0 and 0.25)

Hossain, A and Yanda, P and Cherepanov, VA and Sakthipandi, K and Sundaresan, A (2020) Synthesis, structure, optical and magnetic properties of Nd1�xAxMn0.5Co0.5O3�δ (A = Ba, Sr and Ca; x = 0 and 0.25). In: Ceramics International, 46 (17). pp. 26895-26902.

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Abstract

The structural, optical, and magnetic properties of polycrystalline Nd1-xAxMn0.5Co0.5O3�δ (A = Ba, Sr and Ca; x = 0 and 0.25) perovskite oxides were investigated. The powder XRD pattern demonstrates that the unit cell volume decreases with the changing A-site dopant type. The estimated bandgap energy (Eg) from UV�vis spectroscopic for NdMn0.5Co0.5O3�δ, Nd0.75Ba0.25Mn0.5Co0.5O3�δ, Nd0.75Sr0.25Mn0.5Co0.5O3�δ and Nd0.75Ca0.25Mn0.5Co0.5O3�δ are 3.27, 3.82, 3.79 and 3.53 eV respectively. The substitution of divalent element alters the absorption spectrum, while the redshift optical transition was observed with an increasing ionic radius of dopant. Temperature-dependent magnetization exposes that the Curie temperature (TC) gradually decreases with the decreasing size of alkaline earth metals, and glassy nature was observed at a lower applied magnetic field. The observation of TC can be well explained by the considering of the cationic size disorder parameter in A-site than the random distribution of B-site ions. © 2020 Elsevier Ltd and Techna Group S.r.l.

Item Type:	Journal Article
Publication:	Ceramics International
Publisher:	Elsevier Ltd
Additional Information:	Copy right for this article belongs to Elsevier Ltd
Keywords:	Magnetic properties; Magnetism; Perovskite; Strontium, Applied magnetic fields; Band gap energy; Divalent elements; Perovskite oxides; Polycrystalline; Random distribution; Temperature-dependent magnetizations; Unit-cell volume, Absorption spectroscopy
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	03 Mar 2021 09:51
Last Modified:	03 Mar 2021 09:51
URI:	http://eprints.iisc.ac.in/id/eprint/66277

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