• J., Shankaramurthy G.
• Kodihalli, Nagaraja K.
• Chandamma, N.
• Alsaiari, Abdulmohsen O.
• V., Santhosh Kumar M.
• Prasanna, Dr B. M.

Abstract

<jats:title>Abstract</jats:title><jats:p>Herein we report the effect of<jats:italic>γ</jats:italic>-irradiation on the structural and AC electrical properties of Ni-Zn nanoparticles<jats:inline-formula><jats:tex-math><?CDATA $N{i}_{1-x}Z{n}_{x}F{e}_{2}{O}_{4}(0 x 1)\,$?></jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi>N</mml:mi><mml:msub><mml:mrow><mml:mi>i</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mi>Z</mml:mi><mml:msub><mml:mrow><mml:mi>n</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mi>F</mml:mi><mml:msub><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub><mml:mrow><mml:mfenced close=")" open="(" separators=""><mml:mrow><mml:mn>0</mml:mn><mml:mo>≤</mml:mo><mml:mi>x</mml:mi><mml:mo>≤</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:mfenced></mml:mrow><mml:mspace width=".25em" /></mml:math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="psac850dieqn1.gif" xlink:type="simple" /></jats:inline-formula>synthesised via the citrate auto-combustion technique. The x-ray diffraction (XRD) analysis of the samples revealed a decreasing trend of the crystallite size with increasing concentration of Zn<jats:sup>2+</jats:sup>ions, and -irradiation alters the crystallite size for more Ni<jats:sup>2+</jats:sup>ion concentrations. The lattice constant was found to increase with Zn<jats:sup>2+</jats:sup>concentration, with the highest for x = 0.6. However, after irradiation, substantial change occurs. The lattice strain is greater for x = 1 as well as lower for x = 0.4. The observable modifications in the morphology of the samples upon irradiation are identified. The AC-electrical behaviour of the sample was studied before and after<jats:italic>γ</jats:italic>-irradiation in the frequency range of 1 MHz–23 MHz. Studies show that the dielectric constant increases on irradiation, whereas the dielectric loss and AC conductivity decline after irradiation. The dielectric relaxation changes from non-Debye to Havriliak–Negami relaxation, which is the significance of asymmetric broadness in the relaxation process. The collective AC electrical properties were signifies the radiation absorption response.</jats:p>

Topics

• nanoparticle
• impedance spectroscopy
• x-ray diffraction
• dielectric constant
• combustion