期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 14, 页码 2145-2149出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2009.01.003
关键词
X-ray diffraction; Magnetic measurement; Chemical synthesis; Scanning and transmission electron microscopy; Nanostructure
资金
- Fatih University Research Project Foundation [P50020602]
- Turkish Ministry of Industry and Trade [00185.STZ.2007-2]
- Knut and Alice Wallenbergs Foundation [UAW2004.0224]
Co3O4 nanoparticles have been prepared for the first time via reflux method, as an alternative low-temperature high-yield process, starting from one single precursor. A plausible mechanism is suggested for the synthetic process. XRD, TEM, FTIR and VSM were used for the structural, morphological, spectroscopic, and magnetic characterization of the product respectively. X-ray diffraction line profile fitting showed that average particle size of the sample is 28 nm. Morphology of the synthesized powder was observed to be thin nanosheets with a thickness of 2-3 nm based on SEM and TEM analyses. Magnetic measurements showed a deviation of the Neel temperature from the bulk value which is attributed to the finite size effects. A loop shift with an enhanced coercivity is observed in the field-cooled hysteresis loops. The opening of the hysteresis loop reveals the existence of the spin-glass like surface spins of the Co3O4 nanoparticles. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据