| Abstrakt: |
Mg0.5Cu0.8ErxFe2−xO4 (through x = 0.000, 0.005, 0.010, 0.015, 0.020, 0.025 and 0.030) A series of rare earth (Er3+)-doped magnesium-copper nanoparticles with the general chemical compositions of Mg0.5Cu0.8ErxFe2−xO4 (through x = 0.000, 0.005, 0.010, 0.015, 0.020, 0.025 and 0.030) was fabricated by citrate sol–gel auto combustion technique. The fabricated materials are investigated through XRD, FE-SEM, EDS, TEM, FTIR, UV–Vis, DC resistivity, and TEP properties. The crystallite size of the samples was determined to be 33–40 nm with increased Er3+ concentration, and the XRD investigations validated the spinel cubic structure of the samples with the space group Fd-3 m. The lattice constant was found to decrease from 8.403 to 8.356 Å. The morphology of FE-SEM micrographs was found to be spherical shape. TEM micrographs show that average particle size decreases from 64 to 48 nm. The nanoparticles’ FTIR examination revealed that their ʋ1 and ʋ2 absorption bands were between 401–412 cm−1 and 547–562 cm−1. The optical band gap was measured using UV–vis spectroscopy and found between 1.81 and 2.38 eV. In Mg–Cu nano-ferrites with Er-doping, there was no noticeable increase in the elasticity moduli. With increasing Er-doping and composition, it has been found that the thermal energy needed to change the p-type Mg–Cu nano-ferrites’ behavior from semiconducting to n-type semiconducting behavior increases. Er-doped Mg–Cu ferrites demonstrate a metal–semiconductor behavior according to DC resistivity exploration. [ABSTRACT FROM AUTHOR] |
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