The effect of reaction temperature on the structural and magnetic properties of nano CoFe2O4
The effect of reaction temperature on the structural and magnetic properties of nano CoFe2O4
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DOI：
10.1016/j.ceramint.2017.01.092
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发表时间：
2017-05-01
影响因子：
5.2
通讯作者：
Jimenez, J. A.
中科院分区：
文献类型：
--
作者：
Prabhakaran, T.;Mangalaraja, R. V.;Jimenez, J. A.
纳米钴铁氧体 (CoFe2O4) 在不同反应温度（60、70 和 80 摄氏度）下共沉淀 1 小时。反应温度极大地影响了纳米CoFe2O4的晶粒尺寸和磁性行为。随着反应温度的升高，平均晶粒尺寸在9～15 nm范围内变化，568～550 cm(-1)处金属氧化物振动强度也呈倾斜趋势。合成的样品的化学计量比为1:2（Co:Fe），具有大致球形的形态。合成的钴纳米铁氧体在室温和5 K下表现出铁磁性，饱和磁化强度随着微晶尺寸的增加从6.4增加到20 emu/g。
Nano cobalt ferrites (CoFe2O4) were co-precipitated at various reaction temperatures (60, 70 and 80 degrees C) for 1 h. The reaction temperature greatly influenced the crystallite size and the magnetic behaviours of the nano CoFe2O4. The mean crystallite size ranged from 9 to 15 nm with the increase in the reaction temperature and the intensity of metal oxide vibrations at 568-550 cm(-1) were also inclined. The synthesized samples were in the stoichiometric ratio of 1:2 (Co:Fe) with roughly spherical morphology. The synthesized cobalt nanoferrites exhibited ferromagnetism at room temperature and 5 K, and the saturation magnetization increased from 6.4 to 20 emu/g with the crystallite size.