Magnetic Properties of Ti-Doped Ultrafine CoFe 2 O 4 Powder Grown by the Sol Gel Method

摘要: Ultrafine Ti-doped CoFe2O4 powders, Ti0.2Co1.2Fe1.6O4, are fabricated by the sol gel method and their magnetic crystallographic properties depending on annealing temperature investigated X-ray diffractometer, Mossbauer spectroscopy, a vibrating sample magnetometer. With diffraction spectroscopy measurements, formation of nanocrystallized particles is confirmed when Ti0.2Co1.2Fe1.6O4 ferrite annealed at 473 K. The samples between 673 773 K, show that ferrimagnetic phase paramagnetic coexist. That is, K has 18% phase, 88% phase. But above 873 have only single-phase spinel structure behave ferrimagnetically. Neel our 643 which lower than pure cobalt powder. behaviour powder shows an increase in yields decrease coercivity and, contrast, saturation magnetization. maximum magnetization 1.56 kOe 62.6 emu/g, respectively.