Size-dependent magnetism of EuS nanoparticles.
EuS nanoparticles were synthesized by solution-phase thermolysis of the diethylammonium salt
of the anionic europium dithiocarbamate complex, [Eu(S2CNEt2)4]-. Oleylamine and triphenylphosphine
were used as surfactants to prevent nanoparticle agglomeration and stabilize particle growth.
By varying the synthetic parameters such as reaction temperature, heating time, and the [surfactant]:
[precursor] ratio, nanoparticles of different sizes were obtained. The size-dependent magnetic
properties of these nanoparticles were studied, and it was observed that a decrease in the ferromagnetic
ordering temperature occurs with decreasing particle size.
Kar, Srotoswini., Zuniga, Edward., Wang, Guangbin., Dollahon, Norman., Yee, Gordon., Stoll, Sarah.