Author/Authors :
Chitu، نويسنده , , L. and Jergel، نويسنده , , M. and Majkova، نويسنده , , E. and Luby، نويسنده , , S. and Capek، نويسنده , , I. and Satka، نويسنده , , A. and Ivan، نويسنده , , J. D. Kovac، نويسنده , , J. and Timko، نويسنده , , M.، نويسنده ,
Abstract :
The Fe3O4 and CoFe2O4 nanoparticles of radius 3.2 ± 0.3 and 3.8 ± 0.3 nm, respectively, were synthesized by the high-temperature solution phase reaction of metal acetylacetonates. Nanoparticles with the spherical shape and well-developed crystalline structure are superparamagnetic at room temperature. The CoFe2O4 showed high coercivity up to 1.7 T at low temperatures and a step-like change of magnetization at 138 K, which might point at the Verwey transition.
Keywords :
Fe3O4 , Nanoparticles , CoFe2O4 , Magnetic particles
