Eu-doped silica nanoparticles with different concentrations of europium (3% 6%and 15at.%) were prepared by a hydrothermal procedure. Light scattering measurements of the silica colloids as well as TEM microscopy, revealed a narrow size distribution of the particles, ranging from 5 to 10 nm. X-Ray diffraction showed that all the powders were amorphous. Magnetic susceptibility vs. temperature measurements showed a behavior typical for Eu3+ ions, with a plateau below 60K, and an increase of the mass susceptibility with Eu concentration. The splitting of zero-field cooled (ZFC) and field-coled (FC) susceptibility branches increased with the europium concentration, indicating the presence of interparticle interactions. At temperatures below 40K, a contribution of paramagnetic impurities obeying the Curie law was observed. Heat treatment of the powders at 823K and 1073K increased the magnetic susceptibility. The appearance of a small peak at 70K indicated the presence of small quantities of ...ferromagnetic EuO in the powders after heating.
TY - JOUR
AU - Spasojević, Vojislav
AU - Dramićanin, Miroslav
AU - Jokanović, Vukoman
AU - Andrić, Željka
AU - Blanuša, Jovan
AU - Kusigerski, Vladan
AU - Mitrić, Miodrag
AU - Tadić, Marin
AU - Kapičić, Ana
PY - 2006
UR - http://dais.sanu.ac.rs/123456789/280
AB - Eu-doped silica nanoparticles with different concentrations of europium (3% 6%and 15at.%) were prepared by a hydrothermal procedure. Light scattering measurements of the silica colloids as well as TEM microscopy, revealed a narrow size distribution of the particles, ranging from 5 to 10 nm. X-Ray diffraction showed that all the powders were amorphous. Magnetic susceptibility vs. temperature measurements showed a behavior typical for Eu3+ ions, with a plateau below 60K, and an increase of the mass susceptibility with Eu concentration. The splitting of zero-field cooled (ZFC) and field-coled (FC) susceptibility branches increased with the europium concentration, indicating the presence of interparticle interactions. At temperatures below 40K, a contribution of paramagnetic impurities obeying the Curie law was observed. Heat treatment of the powders at 823K and 1073K increased the magnetic susceptibility. The appearance of a small peak at 70K indicated the presence of small quantities of ferromagnetic EuO in the powders after heating.
PB - Belgrade : Serbian Chemical Society
T2 - Journal of the Serbian Chemical Society
T1 - Magnetic properties of nanostructured SiOo2:Eu3+ powders
SP - 412
EP - 420
VL - 71
IS - 4
DO - 10.2298/JSC0604413S
ER -
@article{
author = "Spasojević, Vojislav and Dramićanin, Miroslav and Jokanović, Vukoman and Andrić, Željka and Blanuša, Jovan and Kusigerski, Vladan and Mitrić, Miodrag and Tadić, Marin and Kapičić, Ana",
year = "2006",
url = "http://dais.sanu.ac.rs/123456789/280",
abstract = "Eu-doped silica nanoparticles with different concentrations of europium (3% 6%and 15at.%) were prepared by a hydrothermal procedure. Light scattering measurements of the silica colloids as well as TEM microscopy, revealed a narrow size distribution of the particles, ranging from 5 to 10 nm. X-Ray diffraction showed that all the powders were amorphous. Magnetic susceptibility vs. temperature measurements showed a behavior typical for Eu3+ ions, with a plateau below 60K, and an increase of the mass susceptibility with Eu concentration. The splitting of zero-field cooled (ZFC) and field-coled (FC) susceptibility branches increased with the europium concentration, indicating the presence of interparticle interactions. At temperatures below 40K, a contribution of paramagnetic impurities obeying the Curie law was observed. Heat treatment of the powders at 823K and 1073K increased the magnetic susceptibility. The appearance of a small peak at 70K indicated the presence of small quantities of ferromagnetic EuO in the powders after heating.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Magnetic properties of nanostructured SiOo2:Eu3+ powders",
pages = "412-420",
volume = "71",
number = "4",
doi = "10.2298/JSC0604413S"
}
Spasojević V, Dramićanin M, Jokanović V, Andrić Ž, Blanuša J, Kusigerski V, Mitrić M, Tadić M, Kapičić A. Magnetic properties of nanostructured SiOo2:Eu3+ powders. Journal of the Serbian Chemical Society. 2006;71(4):412-420
Spasojević, V., Dramićanin, M., Jokanović, V., Andrić, Ž., Blanuša, J., Kusigerski, V., Mitrić, M., Tadić, M.,& Kapičić, A. (2006). Magnetic properties of nanostructured SiOo2:Eu3+ powders.
Journal of the Serbian Chemical SocietyBelgrade : Serbian Chemical Society., 71(4), 412-420.
https://doi.org/10.2298/JSC0604413S
