Dielectric, electrical transport and magnetic properties of (WO3)x/(CuFe2O4)1-x (x = 0.1 to 0.5%) nanocomposites.
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| Title: | Dielectric, electrical transport and magnetic properties of (WO |
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| Authors: | Ali, Kashif1 (AUTHOR), Ilyas, Asif1,2 (AUTHOR) asifilyas@uaar.edu.pk |
| Source: | Journal of Materials Science: Materials in Electronics. Mar2025, Vol. 36 Issue 9, p1-12. 12p. |
| Abstract: | The (WO3)x/(CuFe2O4)1-x; x = 10 to 50 wt% nanocomposites were obtained by powder mixing method. The analysis of phase was confirmed by X-ray diffraction (XRD) pattern, which shows the formation of both phases without any impurities. The Scanning Electron Microscope (SEM) images exhibit the cubic morphology of particles with nano-dimensions and the cubic morphology deteriorated with addition of WO3. The variation of dielectric constant both real (ε/) and imaginary parts (ε//) as a function of log ω was measured over the frequency ranging from 1 kHz to 2 MHz. Both ε/ & ε// also demonstrate the higher value at low frequency and explained by Koops’s theory. Moreover, ε/ and ε// of dielectric constant increases with WO3 contents. This higher value of dielectric constant makes this nanocomposite (NCPs) a promising material in energy storage devices. The A.C. conductivity (σac) also shows an increasing trend with frequency which is attributed to increase in jumping frequency of charges between Fe2+ and Fe3+. The real (Z/) and imaginary (Z//) parts of impedance decreases at higher frequency ascribed to increase in σa.c. The Nyquist plots show one semicircular arc at higher frequency which is attributed to the conduction process produced in grains. The effect of magnetic field on these NCPs was also observed by measuring the M/H loops through Vibrating Sample Magnetometer (VSM) at room temperature. The M/H loops show a typical behavior of ferrimagnetic ceramic with diminish of saturation magnetization (Ms) and coercivity (Hc) with WO3 contents. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The (WO3)x/(CuFe2O4)1-x; x = 10 to 50 wt% nanocomposites were obtained by powder mixing method. The analysis of phase was confirmed by X-ray diffraction (XRD) pattern, which shows the formation of both phases without any impurities. The Scanning Electron Microscope (SEM) images exhibit the cubic morphology of particles with nano-dimensions and the cubic morphology deteriorated with addition of WO3. The variation of dielectric constant both real (ε/) and imaginary parts (ε//) as a function of log ω was measured over the frequency ranging from 1 kHz to 2 MHz. Both ε/ & ε// also demonstrate the higher value at low frequency and explained by Koops’s theory. Moreover, ε/ and ε// of dielectric constant increases with WO3 contents. This higher value of dielectric constant makes this nanocomposite (NCPs) a promising material in energy storage devices. The A.C. conductivity (σac) also shows an increasing trend with frequency which is attributed to increase in jumping frequency of charges between Fe2+ and Fe3+. The real (Z/) and imaginary (Z//) parts of impedance decreases at higher frequency ascribed to increase in σa.c. The Nyquist plots show one semicircular arc at higher frequency which is attributed to the conduction process produced in grains. The effect of magnetic field on these NCPs was also observed by measuring the M/H loops through Vibrating Sample Magnetometer (VSM) at room temperature. The M/H loops show a typical behavior of ferrimagnetic ceramic with diminish of saturation magnetization (Ms) and coercivity (Hc) with WO3 contents. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 09574522 |
| DOI: | 10.1007/s10854-025-14509-4 |
