Structural and Magnetic Properties of BaCo<sub>x</sub>Fe<sub>12x</sub>O<sub>19</sub>(x = 0.2, 0.4, 0.6, &1.0) Nanoferrites Synthesized via Citrate Sol-Gel Method

• 作者: Kirandish Kaur S Bansal Santosh Bhukal Sheenu Jauhar Sonal Singhal
• 来源期刊: 凝固态物理国际期刊(英文)
• 学科: 化学
• 关键词: Barium Ferrite MAGNETIC Moment COERCIVITY XRD
• 年，卷（期）: 2011,（3）
• 页码范围: 101-104
• 页数: 4页
• 分类号: O6

摘要

Cobalt substituted barium ferrites, BaCoxFe12-xO19 (x = 0.2, 0.4, 0.6 & 1.0) have been synthesized via citrate sol-gel method. All the samples have been annealed at 1000℃ and characterized using Fourier Transform Infra Red spectroscopy, X-Ray Diffractography and Vibrating Sample Magnetometry. The FT-IR spectra of the samples exhibit two frequency bands in the range of 580 cm-1 and 460 cm-1, corresponding to the formation of metal oxides. The XRD studies reveal a crystallite size of ~55 nm. The saturation magnetization decreases from 96.3 emu/g to 47.8 emu/g with increasing concentration of cobalt due to the lower magnetic moment of Co2+ (3 μB) as compared to Fe3+ (5 μB). The coercivity values also show a decreasing behaviour from 3800 Oe to 1750 Oe with increasing cobalt concentration due to reduced magnetocrystalline anisotropy.