The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method

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	The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method
	Y. Zhang; Y. Liu; C. L. Fei; Z. Yang; Z. H. Lu; R. Xiong; D. Yin; J. Shi
	2010
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	108 期号:8
摘要	Cobalt ferrite nanoparticles were synthesized via the hydrothermal route with the addition of trisodium citrate dihydrate (Na(3)CA center dot 2H(2)O). The characterizations including x-ray diffraction (XRD) and transmission electron microscope showed that the products of this hydrothermal reaction are composed of cobalt ferrite nanocrystallite and a small amount of FeOOH, and the average crystallite size of the nanoparticles is 7.6 +/- 0.3 nm by XRD. The magnetic measurements revealed the temperature-dependent magnetic properties: The superparamagnetism occurs above 380 K due to the overcoming of energy barrier for the flip of spins, which arises from the magnetocrystalline anisotropy energy and the interparticle interactions due to the aggregation of the nanoparticles; a frozen spin-glasslike state was observed below 20 K, which is accompanied with the decrease in coercivity and high-field paramagnetic susceptibility, as well as the enhancement of saturated magnetization and the effective magnetic anisotropy constant. (C) 2010 American Institute of Physics. [doi:10.1063/1.3499289]
部门归属	[zhang, yue; liu, yong; fei, chunlong; yang, zhi; xiong, rui; yin, di; shi, jing] wuhan univ, minist educ, key lab artificial micro & nanostruct, wuhan 430072, peoples r china. [zhang, yue; liu, yong; fei, chunlong; yang, zhi; xiong, rui; yin, di; shi, jing] wuhan univ, sch phys & technol, wuhan 430072, peoples r china. [lu, zhihong] wuhan univ sci & technol, sch met & mat, wuhan 430072, peoples r china. [xiong, rui; shi, jing] wuhan univ, hubei key lab organ & polymer optoelect mat, wuhan 430072, peoples r china. [shi, jing] acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;zhang, y (reprint author), wuhan univ, minist educ, key lab artificial micro & nanostruct, wuhan 430072, peoples r china;yindi1975@163.com
关键词	Surface Spin Disorder Cofe2o4 Nanoparticles Mn Nanoparticles Mfe2o4 m Size Fe Nanocomposite Nanocrystals Particles Co
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WOS记录号	WOS:000283745100127
引用统计	被引频次：56[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31731
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Zhang,Y. Liu,C. L. Fei,et al. The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method[J]. Journal of Applied Physics,2010,108(8).
APA	Y. Zhang.,Y. Liu.,C. L. Fei.,Z. Yang.,Z. H. Lu.,...&J. Shi.(2010).The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method.Journal of Applied Physics,108(8).
MLA	Y. Zhang,et al."The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method".Journal of Applied Physics 108.8(2010).