Structural, optical and magnetic properties of Sm doped yttrium orthoferrite (YFeO) obtained by sol-gel synthesis route.

Author(s) Bharadwaj, P.S.J.; Kundu, S.; Kollipara, V.Sai; Varma, K.B.R.
Journal J Phys Condens Matter
Date Published 2020 Jan 16
Abstract

Fine powders of Y Sm FeO (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 Å, b  =  7.60 Å, c  =  5.28 Å. These lattice parameters increased with the increase in Sm content at yttrium sites. The strain that was obtained by the Williamson-Hall method increased with the increase in dopant (Sm) 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 YFeO were encountered. It is hoped that these materials with the enhanced magnetic properties could be of potential use for multifarious applications.

DOI 10.1088/1361-648X/ab4845
ISSN 1361-648X
Citation Bharadwaj PS, Kundu S, Kollipara VS, Varma KB. Structural, optical and magnetic properties of Sm doped yttrium orthoferrite (YFeO) obtained by sol-gel synthesis route. J Phys Condens Matter. 2020;32(3):035810.

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