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This study examined the crystallographic and magnetic properties of vanadium-substituted lithium cobalt titanium ferrite, Li 0.7 Co 0.2 Ti 0.2 V 0.2 Fe 1.7 O₄. Ferrite was synthesized using a conventional ceramic method. The samples annealed below 1040 ℃ showed X-ray diffraction peaks for spinel and other phases. However, the sample annealed above 1040 ℃ showed a single spinel phase. The lattice constant of the sample was 8.351 A, which was relatively unaffected by vanadium-substitution. The average grain size after vanadium- substitution was 13.90 ㎛, as determined by scanning electron microscopy. The Mossbauer spectrum could be fitted to two Zeeman sextets, which is the typical spinel ferrite spectra of Fe 3+ with A and B sites, and one doublet. From the absorption area ratio of the Mossbauer spectrum, the cation distribution was found to be (Co 0.2 V 0.2 Fe 0.6 )[Li 0.7 Ti 0.2 Fe 1.1 ]O₄. Vibrating sample magnetometry revealed a saturation magnetization and coercivity of 36.9 emu/g and 88.6 Oe, respectively, which were decreased by vanadium-substitution.

Crystallographic and Magnetic Properties of Li0.7Co0.2Ti0.2V0.2Fe1.7O4Ferrite

Crystallographic and Magnetic Properties of Li_0.7Co_0.2Ti_0.2V_0.2Fe_1.7O₄Ferrite