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Influence of Gd3+-substitution on structural, magnetic, dielectric and modulus spectroscopic characteristics of ZnFe2O4 spinel ferrite nanoparticles.
- Source :
- Journal of Materials Science: Materials in Electronics; Sep2018, Vol. 29 Issue 18, p15878-15893, 16p
- Publication Year :
- 2018
-
Abstract
- The gadolinium (Gd<superscript>3+</superscript>) substituted zinc ferrite nanoparticles (ZnFe<subscript>2−x</subscript>Gd<subscript>x</subscript>O<subscript>4</subscript>) for Gd<superscript>3+</superscript> (x = 0.00, 0.05, 0.10, 0.20) have been synthesized by honey mediated sol-gel auto-combustion method. The X-ray diffraction study revealed the formation of spinel ferrite crystal structure. The Raman spectroscopy and Fourier transform infrared spectroscopy study well support the XRD results analysis. The field emission scanning electron microscopy micrograph revealed spherical morphology and grain size around 10-30 nm for ZnFe<subscript>2−x</subscript>Gd<subscript>x</subscript>O<subscript>4</subscript> (x = 0.10) nanoparticles. The presence of Zn<superscript>2+</superscript> and Fe<superscript>3+</superscript> oxidation state in synthesized nanoparticles was confirmed by X-ray photoelectron spectroscopy. Magnetic properties of the Gd<superscript>3+</superscript> substituted zinc ferrite nanoparticles were investigated by vibrating sample magnetometer at room temperature. The conversion of magnetic hysteresis curves from ferromagnetic to a paramagnetic with the substitution of Gd<superscript>3+</superscript> in zinc ferrite nanoparticles was observed. Frequency dependent dielectric constant and ac conductivity measurements revealed that Gd<superscript>3+</superscript> substitution improved the value of dielectric constant and ac conductivity of the Gd<superscript>3+</superscript> substituted zinc ferrite nanoparticles. Further, the existence of two semicircles in Cole-Cole plot demonstrated the role of both grains and grain boundaries to conduction process in synthesized Gd<superscript>3+</superscript> ion substituted zinc ferrite nanoparticles. Furthermore, the grain relaxation time (τ<subscript>g</subscript>), grain boundary relaxation time (τ<subscript>gb</subscript>), grain resistance (R<subscript>g</subscript>), grain capacitance (C<subscript>g</subscript>), grain boundary resistance (R<subscript>gb</subscript>) and grain boundary capacitance (C<subscript>gb</subscript>) for synthesized ZnFe<subscript>2−x</subscript>Gd<subscript>x</subscript>O<subscript>4</subscript> (x = 0.00, 0.05, 0.10, 0.20) nanoparticles have been calculated using modulus spectroscopy analysis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 29
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 131578654
- Full Text :
- https://doi.org/10.1007/s10854-018-9674-z