Effect of Mechanochemical Treatment on Magnetic Properties of Nanodimensional Magnetite-Type Materials

Z. Cherkezova-Zhelevaa, K. Zaharieva a, K. Buchkov b, B. Blagoev c and I. Mitov a aInstitute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev" St., Bld. 11, 1113 Sofia, Bulgaria bInstitute of Solid State Physics, Bulgarian Academy of Sciences, Tsarigradsko chaussee Blvd., N 72, Sofia 1784, Bulgaria cInstitute of Electronics, Bulgarian Academy of Sciences, Tsarigradsko chaussee Blvd., N 72, Sofia 1784, Bulgaria

Full Text PDF

The presented study compares magnetic properties of Ni-doped magnetites Ni2+0.5Fe2+0.5Fe3+2O4 to magnetite (Fe3O4) sample. Physicochemical properties of materials were registered by means of X-ray powder diffraction, Mössbauer spectroscopy, saturation magnetization and physical properties measurement systems. It was obtained that used preparation procedures lead to synthesis of single phase spinel materials with close nanodimensional size about 8-12 nm. Mechanochemically synthesized sample shows better magnetic properties as lower blocking temperature of superparamagnetic state and minimal coercivity in comparison to other studied materials.

DOI: 10.12693/APhysPolA.126.912 PACS numbers: 75.60.-d, 75.75.-c, 82.80.Ej