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Crystal chemistry and single-phase synthesis of Gd3+ substituted Co–Zn ferrite nanoparticles for enhanced magnetic properties

Rare earth (RE) ions are known to improve the magnetic interactions in spinel ferrites if they are accommodated in the lattice, whereas the formation of a secondary phase leads to the degradation of the magnetic properties of materials. Therefore, it is necessary to solubilize the RE ions in a spine...

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Published in:RSC advances 2018-01, Vol.8 (44), p.25258-25267
Main Authors: Pawar, R A, Patange, Sunil M, Shitre, A R, Gore, S K, Jadhav, S S, Shirsath, Sagar E
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container_start_page 25258
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Patange, Sunil M
Shitre, A R
Gore, S K
Jadhav, S S
Shirsath, Sagar E
description Rare earth (RE) ions are known to improve the magnetic interactions in spinel ferrites if they are accommodated in the lattice, whereas the formation of a secondary phase leads to the degradation of the magnetic properties of materials. Therefore, it is necessary to solubilize the RE ions in a spinel lattice to get the most benefit. In this context, this work describes the synthesis of Co–Zn ferrite nanoparticles and the Gd3+ doping effect on the tuning of their magnetic properties. The modified sol–gel synthesis approach offered a facile way to synthesize ferrite nanoparticles using water as the solvent. X-ray diffraction with Rietveld refinement confirmed that both pure Co–Zn ferrite and Gd3+ substituted Co–Zn ferrite maintained single-phase cubic spinel structures. Energy dispersive spectroscopy was used to determine the elemental compositions of the nanoparticles. Field and temperature dependent magnetic characteristics were measured by employing a vibration sample magnetometer in field cooled (FC)/zero field cooled (ZFC) modes. Magnetic interactions were also determined by Mössbauer spectroscopy. The saturation magnetization and coercivity of Co–Zn ferrite were improved with the Gd3+ substitution due to the Gd3+ (4f7)–Fe3+ (3d5) interactions. The increase in magnetization and coercivity makes these Gd3+ substituted materials applicable for use in magnetic recording media and permanent magnets.
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The saturation magnetization and coercivity of Co–Zn ferrite were improved with the Gd3+ substitution due to the Gd3+ (4f7)–Fe3+ (3d5) interactions. 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subjects Chemical synthesis
Chemistry
Cobalt
Coercivity
Gadolinium
Lattice vibration
Magnetic properties
Magnetic recording
Magnetic saturation
Magnetic storage
Magnetism
Magnetization
Material properties
Mossbauer spectroscopy
Nanoparticles
Organic chemistry
Permanent magnets
Rare earth elements
Recording instruments
Spinel
Substitutes
Temperature dependence
Vibration measurement
X-ray diffraction
Zinc
Zinc ferrites
title Crystal chemistry and single-phase synthesis of Gd3+ substituted Co–Zn ferrite nanoparticles for enhanced magnetic properties
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