Substantial effect of Cr doping on the third-order nonlinear optical properties of ZnO nanostructures

Mathai, Jincy; Jose, Ayona K; Anjana, M.P.; Aleena, P.A.; Kunjumon, Jibi; Ittyachan, Reena; Nair, Sutheertha S.; Vinitha, G.; Sajan, D.

doi:10.1016/j.optmat.2023.114128

Cited by 13 publications

(1 citation statement)

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“…Among these transition metals, Cr 3+ ions can easily be substituted into the ZnO framework because their ionic radius value is close to the ionic radius of Zn 2+ ions [3]. The inclusion of chromium ions with the ZnO creates additional impurity levels or point defects in the ZnO lattice and thereby improves its physicochemical properties [4]. The inclusion of chromium with the ZnO augments the optoelectronic, optoelectrical, photocatalytic, magnetic, and antimicrobial properties of ZnO nanostructures [1,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Insights into the compositional and temperature-mediated magnetic characteristics of chromium-doped ZnO nanoparticles

Rizwana Begum,

Anitha,

Thirumurugan

et al. 2024

J. Phys.: Condens. Matter

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This study explores the influence of chromium content and temperature on the magnetic characteristics of ZnO synthesized via the cost-effective coprecipitation approach. The host ZnO structure is not significantly changed by chromium doping, even at 5 wt.% of chromium concentration, according to x-ray diffraction studies. The Zn–O characteristic stretching vibration band at 480 cm−1 and the other functional group attached to the Cr-doped ZnO nanoparticles are confirmed by Fourier-transform infrared (FTIR) spectroscopy studies. Diffuse reflectance spectroscopy analysis shows the interaction between chromium ions and ZnO causes bandgap narrowing, and the observed optical bandgap values fall as chromium content increases in the host ZnO matrix. Point defects such as zinc interstitial, zinc vacancy, and oxygen vacancy that exist in the Cr-doped ZnO nanoparticles are inveterate through photoluminescence spectroscopy. Vibrating sample magnetometry investigations reveal weak ferromagnetic behavior at low applied fields and diamagnetic signatures dominating at high applied fields in the Cr-doped ZnO nanoparticles at 300 K. The magnetic characteristics are also tunable in terms of temperatures, which opens new avenues for fabricating dilute magnetic semiconductors with various applications.

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