Solvothermal Synthesis Derived Co-Ga Codoped ZnO Diluted Magnetic Degenerated Semiconductor Nanocrystals
Journal of Alloys and Compounds 2018
Andris Šutka, Tanel Kaambre, Urmas Joost, Kuno Kooser, Mati Kook, Roberto Felix Duarte, Vambola Kisand, Mikhael Maiorov, Nicola Dobelin, Krisjanis Smits

Here we are reporting solvothermal synthesis derived diluted magnetic and plasmonic Co-Ga co-doped ZnO nanocrystals with high magnetization values (from 1.02 to 4.88 emu/g) at room temperature. Co-Ga co-doped ZnO nanocrystals show up to 2 fold increase in saturation magnetization compared to Co doped ZnO nanocrystals at the same Co concentration, with the observed room temperature magnetization higher than previously reported values for multifunctional magnetic and plasmonic nanocrystals, and the effect of Ga suggesting some role of the correspondingly introduced itinerant charge. While at the lowest Ga content the nanoparticles appear homogeneously doped, we note that already a moderate Ga content of several percent triggers a fraction of Co to segregate in metallic form in the bulk of the nanoparticles. However, the amount of segregated Co is not sufficient to account for the total effect, whereas a dominating contribution to the observed magnetism has to be related to itinerant charge mediated exchange interactions.

ZnO; Plasmonic nanocrystals; Doping Diluted magnetic semiconductors; Degenerated semiconductors; Solvothermal synthesis.

Šutka, A., Kaambre, T., Joost, U., Kooser, K., Kook, M., Duarte, R., Kisand, V., Maiorov, M., Dobelin, N., Smits, K. Solvothermal Synthesis Derived Co-Ga Codoped ZnO Diluted Magnetic Degenerated Semiconductor Nanocrystals. Journal of Alloys and Compounds, 2018, Vol.763, pp.164-172. ISSN 0925-8388. Available from: doi:10.1016/j.jallcom.2018.05.036

Publication language
English (en)
The Scientific Library of the Riga Technical University.
E-mail:; Phone: +371 28399196