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Investigation of magnetic and dielectric properties of Agx-substituted Co0.05−x Zn0.95O dilute magnetic semiconductor prepared by co-precipitation method

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Abstract

A series of Agx-substituted Co0.05−x Zn0.95O (x = 0.00–0.05) nanoparticles calcined at 700 °C have been synthesized using a simple co-precipitation technique. The prepared nanoparticles have been analyzed for their structural, optical, magnetic, and dielectric properties using X-ray diffractometer, Fourier infrared spectroscopy, UV–visible spectroscopy, vibrating sample magnetometer, and inductor capacitor and resistor meter, respectively. The XRD results verify the formation of pure hexagonal wurtzite structure. FTIR spectra show a band at 439 cm−1 that is the characteristic stretching band of Zn–O which also confirms the formation of hexagonal structure. The band-gap energy decreases as the concentration of Ag increases except for samples with concentration x = 0.01 and x = 0.03. VSM results reveal that nanoparticles exhibit ferromagnetism at room temperature. The dielectric constant and tangent loss decreases with increasing frequency. However, the a.c. conductivity increases with increasing frequency. The prepared nanoparticles can be used in a variety of applications such as optoelectronic, memory, and microelectronic devices.

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Acknowledgements

I am highly thankful to Dr. Shahid Atiq, Associate Professor, Centre for Solid State Physics, University of the Punjab, Lahore, Pakistan for his co-operation in doing dielectric measurements.

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  1. Department of Physics, Lahore College for Women University, Lahore, Pakistan

    Safia Anjum & Maryam Anjum

  2. Department of Physics, Lahore Garrison University, Lahore, Pakistan

    Zeeshan Mustafa

  3. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Beijing, China

    Zeeshan Mustafa

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Anjum, S., Anjum, M. & Mustafa, Z. Investigation of magnetic and dielectric properties of Agx-substituted Co0.05−x Zn0.95O dilute magnetic semiconductor prepared by co-precipitation method. Appl. Phys. A 126, 753 (2020). https://doi.org/10.1007/s00339-020-03892-w

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