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Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles

We have synthesized disordered double perovskite Gd(2)CoCrO(6) (GCCO) nanoparticles with an average particle size of 71 ± 3 nm by adopting a citrate sol–gel method to investigate their structural, magnetic, and optical properties. Rietveld refinement of the X-ray diffraction pattern showed that GCCO...

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Autores principales: Hosen, M. J., Basith, M. A., Syed, I. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10258676/
https://www.ncbi.nlm.nih.gov/pubmed/37312994
http://dx.doi.org/10.1039/d3ra02233a
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author Hosen, M. J.
Basith, M. A.
Syed, I. M.
author_facet Hosen, M. J.
Basith, M. A.
Syed, I. M.
author_sort Hosen, M. J.
collection PubMed
description We have synthesized disordered double perovskite Gd(2)CoCrO(6) (GCCO) nanoparticles with an average particle size of 71 ± 3 nm by adopting a citrate sol–gel method to investigate their structural, magnetic, and optical properties. Rietveld refinement of the X-ray diffraction pattern showed that GCCO is crystallized in a monoclinic structure with space group P2(1)/n, which is further confirmed by Raman spectroscopic analysis. The absence of perfect long-range ordering between Co and Cr ions is confirmed by the mixed valence states of Co and Cr. A Néel transition was observed at a higher temperature of T(N) = 105 K compared to that of an analogous double perovskite Gd(2)FeCrO(6) due to a greater degree of magnetocrystalline anisotropy of Co than Fe. Magnetization reversal (MR) behavior with a compensation temperature of T(comp) = 30 K was also observed. The hysteresis loop obtained at 5 K exhibited the presence of both ferromagnetic (FM) and antiferromagnetic (AFM) domains. Super-exchange and Dzyaloshinskii–Moriya (DM) interactions between various cations via oxygen ligands are responsible for the observed FM or AFM ordering in the system. Furthermore, UV-visible and photoluminescence spectroscopy demonstrated the semiconducting nature of GCCO with a direct optical bandgap of 2.25 eV. The Mulliken electronegativity approach revealed the potential applicability of GCCO nanoparticles in photocatalytic H(2) and O(2) evolution from water. Due to a favorable bandgap and potentiality as a photocatalyst, GCCO can be a promising new member of double perovskite materials for photocatalytic and related solar energy applications.
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spelling pubmed-102586762023-06-13 Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles Hosen, M. J. Basith, M. A. Syed, I. M. RSC Adv Chemistry We have synthesized disordered double perovskite Gd(2)CoCrO(6) (GCCO) nanoparticles with an average particle size of 71 ± 3 nm by adopting a citrate sol–gel method to investigate their structural, magnetic, and optical properties. Rietveld refinement of the X-ray diffraction pattern showed that GCCO is crystallized in a monoclinic structure with space group P2(1)/n, which is further confirmed by Raman spectroscopic analysis. The absence of perfect long-range ordering between Co and Cr ions is confirmed by the mixed valence states of Co and Cr. A Néel transition was observed at a higher temperature of T(N) = 105 K compared to that of an analogous double perovskite Gd(2)FeCrO(6) due to a greater degree of magnetocrystalline anisotropy of Co than Fe. Magnetization reversal (MR) behavior with a compensation temperature of T(comp) = 30 K was also observed. The hysteresis loop obtained at 5 K exhibited the presence of both ferromagnetic (FM) and antiferromagnetic (AFM) domains. Super-exchange and Dzyaloshinskii–Moriya (DM) interactions between various cations via oxygen ligands are responsible for the observed FM or AFM ordering in the system. Furthermore, UV-visible and photoluminescence spectroscopy demonstrated the semiconducting nature of GCCO with a direct optical bandgap of 2.25 eV. The Mulliken electronegativity approach revealed the potential applicability of GCCO nanoparticles in photocatalytic H(2) and O(2) evolution from water. Due to a favorable bandgap and potentiality as a photocatalyst, GCCO can be a promising new member of double perovskite materials for photocatalytic and related solar energy applications. The Royal Society of Chemistry 2023-06-12 /pmc/articles/PMC10258676/ /pubmed/37312994 http://dx.doi.org/10.1039/d3ra02233a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Hosen, M. J.
Basith, M. A.
Syed, I. M.
Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles
title Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles
title_full Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles
title_fullStr Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles
title_full_unstemmed Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles
title_short Structural, magnetic and optical properties of disordered double perovskite Gd(2)CoCrO(6) nanoparticles
title_sort structural, magnetic and optical properties of disordered double perovskite gd(2)cocro(6) nanoparticles
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10258676/
https://www.ncbi.nlm.nih.gov/pubmed/37312994
http://dx.doi.org/10.1039/d3ra02233a
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