期刊
APPLIED PHYSICS LETTERS
卷 94, 期 9, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.3095484
关键词
bonds (chemical); electron microscopy; high-temperature effects; iron compounds; magnetic circular dichroism; magnetic moments; magnetic semiconductors; magnetisation; nanofabrication; nanoparticles
资金
- Spanish MEC [NAN2004-08805-C04-02, NAN2004-08805-C04-01, MAT2006-03999, MAT2008-01077, MAT2008-01489, CSD2006-00012]
- Catalan DURSI [2005SGR00969]
5 nm Fe3-xO4 nanoparticles were synthesized either by high-temperature decomposition in organic phase or in low-temperature aqueous conditions. In the first case oleic acid was covalently bonded to the nanoparticles; in the second case polyvinyl alcohol (PVA) yielded a protective coating without chemical bond. Magnetization measurements and x-ray magnetic circular dichroism showed a saturation magnetization close to bulk magnetite and an orbital moment effectively quenched in covalently bonded nanoparticles. PVA-coated nanoparticles showed a reduced value of the magnetization and similar to 3 fold increase in the orbital moment. High resolution electron microscopy suggested that this was related to the nanostructure of the samples.
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