TY  - JOUR
AU  - Omelyanchik, Alexander
AU  - da Silva, Franciscarlos Gomes
AU  - Gomide, Guilherme
AU  - Kozenkov, Ivan
AU  - Depeyrot, Jerome
AU  - Aquino, Renata
AU  - Campos, Alex Fabiano Cortez
AU  - Fiorani, Dino
AU  - Peddis, Davide
AU  - Rodionova, Valeria
AU  - Jovanović, Sonja
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9857
AB  - The structural and magnetic properties of iron oxide nanoparticles obtained by the precipitation of iron ions in the presence of different amounts of citric acid were studied. The citric acid acts as a capping agent and provides control of the particle size to be obtained. The size dependence of the magnetic properties was investigated by comparing the results for ~2, 4, 6, and 8 nm particles. With decreasing the particle size, a reduction of the saturation magnetization (from ~84 to 33 Am2/kg) and an increase of coercivity (from ~32 to ~100 mT) were observed, due to the increasing role of the disordered surface. The behaviour of the zero-field cooled/field cooled magnetization curves indicates a superspin-glass freezing for 2 nm and 4 nm particle samples. Memory experiments below the freezing temperature on the 2 nm particle sample provide further evidence of a glassy magnetic state. The observation of exchange bias, due to core/shell interface exchange coupling, for 2 nm and 4 nm particle samples provides evidence of a surface spin-glass type freezing, which contributes to the observed glassy properties.
T2  - Journal of Alloys and Compounds
T1  - Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles
VL  - 883
SP  - 160779
DO  - 10.1016/j.jallcom.2021.160779
ER  - 

@article{
author = "Omelyanchik, Alexander and da Silva, Franciscarlos Gomes and Gomide, Guilherme and Kozenkov, Ivan and Depeyrot, Jerome and Aquino, Renata and Campos, Alex Fabiano Cortez and Fiorani, Dino and Peddis, Davide and Rodionova, Valeria and Jovanović, Sonja",
year = "2021",
abstract = "The structural and magnetic properties of iron oxide nanoparticles obtained by the precipitation of iron ions in the presence of different amounts of citric acid were studied. The citric acid acts as a capping agent and provides control of the particle size to be obtained. The size dependence of the magnetic properties was investigated by comparing the results for ~2, 4, 6, and 8 nm particles. With decreasing the particle size, a reduction of the saturation magnetization (from ~84 to 33 Am2/kg) and an increase of coercivity (from ~32 to ~100 mT) were observed, due to the increasing role of the disordered surface. The behaviour of the zero-field cooled/field cooled magnetization curves indicates a superspin-glass freezing for 2 nm and 4 nm particle samples. Memory experiments below the freezing temperature on the 2 nm particle sample provide further evidence of a glassy magnetic state. The observation of exchange bias, due to core/shell interface exchange coupling, for 2 nm and 4 nm particle samples provides evidence of a surface spin-glass type freezing, which contributes to the observed glassy properties.",
journal = "Journal of Alloys and Compounds",
title = "Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles",
volume = "883",
pages = "160779",
doi = "10.1016/j.jallcom.2021.160779"
}

Omelyanchik, A., da Silva, F. G., Gomide, G., Kozenkov, I., Depeyrot, J., Aquino, R., Campos, A. F. C., Fiorani, D., Peddis, D., Rodionova, V.,& Jovanović, S.. (2021). Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles. in Journal of Alloys and Compounds, 883, 160779.
https://doi.org/10.1016/j.jallcom.2021.160779

Omelyanchik A, da Silva FG, Gomide G, Kozenkov I, Depeyrot J, Aquino R, Campos AFC, Fiorani D, Peddis D, Rodionova V, Jovanović S. Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles. in Journal of Alloys and Compounds. 2021;883:160779.
doi:10.1016/j.jallcom.2021.160779 .

Omelyanchik, Alexander, da Silva, Franciscarlos Gomes, Gomide, Guilherme, Kozenkov, Ivan, Depeyrot, Jerome, Aquino, Renata, Campos, Alex Fabiano Cortez, Fiorani, Dino, Peddis, Davide, Rodionova, Valeria, Jovanović, Sonja, "Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles" in Journal of Alloys and Compounds, 883 (2021):160779,
https://doi.org/10.1016/j.jallcom.2021.160779 . .