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退火温度对纳米Co0.8Mg0.2Fe2O4/SiO2复合薄膜结构和磁性的影响

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Abstract:

采用溶胶-凝胶旋涂法制备纳米Co0.8Mg0.2Fe2O4/SiO2复合薄膜。用X射线衍射仪、原子力显微镜及振动样品磁强计分析复合薄膜的结构、表面形貌和磁性,研究退火温度对复合薄膜结构和磁性的影响。结果表明经800℃退火处理的样品中已形成Co0.8Mg0.2Fe2O4晶相;随着退火温度的提高,Co0.8Mg0.2Fe2O4晶粒尺寸变大,晶格常数减小;随着Co0.8Mg0.2Fe2O4晶粒尺寸的增大,样品的磁化强度和剩磁比变大,矫顽力先增大后减小,经1100℃退火处理样品的垂直膜面矫顽力达到296.1kA/m;样品存在较明显的垂直磁各向异性。

References

[1]  ZHAO L J, JIANG Q. Effects of applied magnetic field and pressures on the magnetic properties of nanocrystalline CoFe2O4 ferrite [J]. J Magn Magn Mater, 2010, 322: 2485-2487. [2] MENG X D, LI H B, CHEN J Y, et al. M?ssbauer study of cobalt ferrite nanocrystals substituted with rare-earth Y3+ ions [J]. J Magn Magn Mater, 2009, 321: 1155-1158. [3] AXELSSON A K, VALANT M, FENNER L, et al. Chemistry of post- annealing of epitaxial CoFe2O4 thin films [J]. Thin Solid Films, 2009, 517: 3742-3747. [4] YIN J H, LIU B H, DING J, et al. High coercivity in nanostructured Co-ferrite thin films [J]. Bull Mater Sci, 2006, 29(6): 573-580. [5] G?ZüAK F, K?SEO?LU Y, BAYKAL A, et al. Synthesis and characterization of CoxZn1-xFe2O4 magnetic nano-particles via a PEG-assisted route [J]. J Magn Magn Mater, 2009, 321: 2170-2177. [6] SILVA J B, MOHALLEM N D S. Preparation of composites of nickel ferrites dispersed in silica matrix [J]. J Magn Magn Mater, 2001, 226-230: 1393-1396. [7] CONGIU F, CONCAS G, ENNAS G, et al. Magnetic properties of nanocrystalline CoFe2O4 dispersed in amorphous silica [J]. J Magn Magn Mater, 2004, 272-276: 1561-1562. [8] MOHALLEM N D S, SEARA L M, NOVAK M A, et al. Magnetic nano-composite thin films prepared by sol-gel process [J]. Braz J Phys, 2006, 36(3B): 1078-1080. [9] 李海波, 华杰, 刘梅, 等. Co0.8Zn0.2Fe2O4/SiO2纳米复合材料的结构和磁性[J]. 硅酸盐学报, 2010, 38(6): 1048-1052. LI Haibo, HUA Jie, LIU Mei, et al. J Chin Ceram Soc (in Chinese), 2010, 38(6): 1048-1052. [10] ARULMURUGAN R, VAIDYANATHAN G, SENDHILNATHAN S, et al. Co-Zn ferrite nano-particles for ferrofluid preparation:Study on magnetic properties [J]. Physica B, 2005, 363: 225-231. [11] MAAZ K, KHALID W, MUMTAZ A, et al. Magnetic characterization of Co1-xNixFe2O4 (0≤x≤1) nanoparticles prepared by co-precipitation route [J]. Physica E, 2009, 41: 593-599. [12] MATHE V L, SHEIKH A D. Magnetostrictive properties of nanocrystalline Co-Ni ferrites [J]. Physica B, 2010, 405: 3594-3598. [13] YIN J H, DING J, LIU B H, et al. Magnetic anisotropy and high coercivity of epitaxial Co-ferrite films prepared by pulsed laser deposition [J]. J Appl Phys, 2007, 101: 09k509 (1-3). [14] 李海波, 陈敬艳, 刘梅, 等. 纳米复合材料CoFe2O4/SiO2的制备和表征[J]. 高等化学学报, 2007, 28(4): 614-616. LI Haibo, CHEN Jingyan, LIU Mei, et al. Chem J Chin Univ (in Chinese), 2007, 28(4): 614-616. [15] 张伯军, 华杰, 刘梅, 等. 纳米复合材料Co0.5Ni0.5Fe2O4-SiO2的显微结构和磁性[J]. 硅酸盐学报, 2008, 36(3): 292-295. ZHANG Bojun, HUA Jie, LIU Mei, et al. J Chin Ceram Soc (in Chinese), 2008, 36(3): 292-295. [16] 张伯军, 陈敬艳, 刘梅, 等. 热处理温度对纳米CoFe2O4/SiO2复合材料结构和磁性的影响[J]. 复合材料学报, 2008, 25(3): 144-148. ZHANG Bojun, CHEN Jingyan, LIU Mei, et al. Acta Materiae Compositae Sinca (in Chinese), 2008, 25(3): 144-148. [17] MARTINEZ B, ROIG A, OBRADORS X, et al. Magnetic propertied of γ-Fe2O3 nanoparticles obtained by vaporization condensation in solar furnace [J]. J Appl Phys, 1996, 79: 2580-2586. [18] CHEN D H, HE X R. Synthesis of nickel ferrite nanoparticles by sol-gel method [J]. Mater Res Bull, 2001, 36: 1369-1377. [19] JUNG J S, LIN J H, CHOI K H, et al. CoFe2O4 nanostructures with high coercivity [J]. J Appl Phys, 2005, 97: 10F306 (1-3).

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