Abstract
<title>Abstract</title> <p>CdO nanoparticle and chromium–Zinc codoped CdO nanoparticles were synthesized by Hydrothermal method with a calcination temperature of 400°C and various analytical techniques were employed to examine their physical, optical and magnetic and electric properties. The X-ray diffraction (XRD) pattern of CdO NPs indicate the cubical structure, with a prominent peak is observed at (111) plane. The Debye-Scherer method has been used to calculate average crystallite size and strain. The lowest crystallite size 27.86 nm was found for Cr doping. UV–visible spectroscopy (300–900 nm) was prepared CdO NPs. From the absorbance curve, it was observed that the absorbance increases gradually up to a certain corresponding wavelength at around 265 nm, followed by an exponential decrease at higher wavelengths and the highest band gap was 5.57 eV, which was found for increasing of Cr doping. Fourier transform infrared spectroscopy (FTIR) verifies the existence of Cd–O and O–C–O vibrations in the sample. Both pure and Cr/Zn-doped CdO nanoparticles revealed the ferromagnetic behaviour by vibrating sample magnetometer (PPMS-VSM) wherein the increasing doping percentage of Cr (\(\:{Cd}_{0.90}{Zn}_{0.025}{Cr}_{0.075}O\)) enhanced the ferromagnetic characteristics. The tangent loss (tanδ) displayed a sharp decline followed by a minor increase in the samples with zinc concentration x = 0.1.</p>