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Structural and Magnetic Properties of Chemically Synthesized Pd-Modified NiFe2O4 Nanoparticles
Shahid Atiq1, Shahid M. Ramay2, Asif Mahmood3, Saira Riaz1, Shahzad Naseem1
1.Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore-54590, Pakistan;2.Physics and Astronomy Department, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia;3.Chemical Engineering Department, College of Engineering, King Saud University, P. O. Box 800, Riyadh 11421, Saudi Arabia
Abstract:
Magnetic nanoparticles of NiFe2O4-Pd composites have been synthesized using a simple, low cost, sol-gel auto-combustion method. As-prepared samples were sintered at 800 ℃ for 6 h in order to develop the crystalline phase. X-ray diffraction confirmed the spinel structure of the ferrite samples. Structural morphology and size of the nanoparticles were evaluated using a field emission scanning electron microscope. Magnetic hysteresis loops were obtained at 300 and 100 K using a physical properties measurement system. The value of saturation magnetization was observed to decrease at the temperatures with the increase of Pd contents up to 5% but then a sudden rise in saturation magnetization was observed for the addition of 10% Pd in NiFe2O4.
Key words:  Magnetic nanoparticles  Sol-gel auto-combustion  Low temperature magnetic property
FundProject:
附件
化学合成的钯改性的NiFe2O4纳米颗粒的结构和磁性
ShahidAtiq1, ShahidM.Ramay2, AsifMahmood3, SairaRiaz1, ShahzadNaseem1
1.巴基斯坦旁遮普邦大学固体物理卓越中心, 拉合尔 100190;2.沙特阿拉伯沙特国王大学理学院物理与天文学系, 利雅得 11421;3.沙特阿拉伯沙特国王大学工程学院化学工程系, 利雅得 11421
摘要:
采用溶胶-凝胶自动燃烧方法合成了镍铁-钯复合材料NiFe2O4-Pd的磁性纳米颗粒. 样品在800 ℃烧结6 h生成结晶相. X射线衍射证实样品呈尖晶石结构. 利用场发射扫描电子显微镜研究结构形态和纳米颗粒的大小. 饱和磁化强度在100和300 K时,随着钯含量增加达5%降低,但加入10%Pd时磁化强度突然上升.
关键词:  磁性纳米粒子  溶胶-凝胶自动燃烧  低温磁性质
DOI:10.1063/1674-0068/29/cjcp1507158
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