Structural, optical and magnetic properties of Sm3+ doped yttrium orthoferrite (YFeO3) obtained by sol-gel synthesis route

Bharadwaj, PSJ and Kundu, S and Kollipara, VS and Varma, KBR (2020) Structural, optical and magnetic properties of Sm3+ doped yttrium orthoferrite (YFeO3) obtained by sol-gel synthesis route. In: Journal of Physics Condensed Matter, 32 (3).

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Abstract

Fine powders of Y1-xSmxFeO3 (x = 0, 0.05, 0.10, 0.15) were synthesized via citrate based sol-gel route. While the as synthesized powders were amorphous, the calcined (900 °C/8 h) powders were confirmed to be polycrystalline by X-ray powder diffraction (XRD) studies. The calcined powders were found to crystallize in an orthorhombic structure associated with the lattice parameters a = 5.59 à , b = 7.60 à , c = 5.28 à . These lattice parameters increased with the increase in Sm3+ content at yttrium sites. The strain that was obtained by the Williamson-Hall method increased with the increase in dopant (Sm3+) concentration vis-à -vis a decrease in crystallite size. Diffuse reflectance spectroscopic studies suggest an increase in band gap as Sm doping level increased. Significant enhancement in magnetization associated with a decrease in coercive field accompanied by a transition from anti-ferromagnetic to soft ferromagnetic behaviour in Sm doped YFeO3 were encountered. It is hoped that these materials with the enhanced magnetic properties could be of potential use for multifarious applications. © 2019 IOP Publishing Ltd.

Item Type:	Journal Article
Publication:	Journal of Physics Condensed Matter
Publisher:	Institute of Physics Publishing
Additional Information:	The copyright for this article belongs to Institute of Physics Publishing.
Keywords:	Calcination; Crystallite size; Energy gap; Ferromagnetic materials; Ferromagnetism; Lattice constants; Magnetic properties; Photoluminescence; Powders; Rare earths; Samarium; Sol-gel process; Sol-gels; Spectroscopic analysis; X ray powder diffraction; Yttrium; Yttrium oxide, As-synthesized powder; Diffuse reflectance; Multiferroics; Orthorhombic structures; Rare earth orthoferrites; Sol - Gel synthesis; Spectroscopic studies; Superexchange interaction, Iron compounds
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	08 Feb 2023 08:48
Last Modified:	08 Feb 2023 08:48
URI:	https://eprints.iisc.ac.in/id/eprint/80064

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