Dependence of magnetic properties on crystallite size of CoFe2O4nanoparticles synthesised by auto-combustion method

作者：Yanchen Liu, Y. Zhang, Jie Feng, Chaofan Li, Jiao Shi, Rui Xiong · 发表于：Journal of Experimental Nanoscience · 年份：2009 · DOI：10.1080/17458080902929895 · 被引用次数：75 · 研究领域：Magnetic Properties and Synthesis of Ferrites、Iron oxide chemistry and applications、Characterization and Applications of Magnetic Nanoparticles

Cobalt ferrite (CoFe2O4) nanoparticles were prepared through an auto-combustion method. The results of XRD show that the crystallite size of CoFe2O4 nanoparticles increases from 57 to 105 nm with a slight change in lattice constant as the annealing temperature increases from 300 to 1200°C. The magnetic measurements by vibrating sample magnetometer (VSM) show that M s increases monotonously by increasing the annealing temperature from 300 to 1200°C and C hB and M s reached a maximum when annealing temperature is about 400°C due to the change of the grain size.