부산대학교 도서관

Cadmium-substituted ZnAl 2 O 4 (Cd x Zn (1- x) Al 2 O 4 , where x = 0, 0.1, 0.3, and 0.5) nanoparticles were synthesized by the microwave combustion process. The XRD analysis confirmed the cubic system. The crystallite size of Cd2+ doped ZnAl 2 O 4 isin the range between 20.82 and 15.12 nm. Fourier transform infrared (FT-IR) spectra are displayed the stretching frequencies. The energy gap values decrease from 4.15 to 2.67 eV with increasing doping concentrations of Cd2+, which is due to the formation of sub-bands and is calculated by the Kubelka-Munk function. HR-SEM pictures showed the features of nanoclusters grain boundaries. The elemental mixing of Zn2+/Cd2+, Al3+andO2− was confirmed by EDX analysis. Magnetic properties reveal that the undoped ZnAl 2 O 4 has diamagnetism and Cd2+ doped ZnAl 2 O 4 system has superparamagnetic behaviour. The nonlinear index of refraction (10−8 cm2/W), nonlinear absorption coefficient (10−4 cm/W) and the 3rd order nonlinear susceptibility (10−6 esu) are found out by Z-scan experiments. The obtained results of optical limiting analysis confirm that these materials are viable candidates for devices like optical power limiters and optical switches. • The Cd x Zn (1- x) Al 2 O 4 (x = 0, 0.1, 0.3, and 0.5) composites were prepared via microwave strategy. • Optical, thermal, and magnetic properties of Cd x Zn (1- x) Al 2 O 4 composites were studied. • Third-order nonlinear parameters for prepared composites were obtained via Z-scan experiments. • Low limiting threshold values make these composites suitable for optoelectronic devices. [ABSTRACT FROM AUTHOR]