期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 451, 期 -, 页码 793-798出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2017.12.019
关键词
CoFe2O4; High-frequency properties; Nanocubes
资金
- National Natural Sciences Foundation of China [51501003, 51401001]
- National Basic Research Program of China [2016YFA0202301]
Magnetic materials with significant permeability and high resonance frequency are a challenge due to the Snoek limit, but it is possible to achieve breakthroughs by inducing superparamagnetism in magnetic nanoparticles. Here, size-controlled monodisperse CoFe2O4 nanocubes (NCs) were successfully synthesized via a facile high-temperature organic-phase method. The superparamagnetic/ferrimagnetic relaxation induced high frequency properties of CoFe2O4 NCs controlled by particle size has been investigated. The resonance frequency of CoFe2O4 NCs increases from 6.0 GHz to 6.3 GHz with decreasing particle size from 40 to 19 nm. With further decreasing particle size to 13 nm, no resonance peak can be observed in the measured frequencies from 4 GHz to 10 GHz, which can be attributed to the superpara magnetic/ferromagnetic relaxation tuned by particle sizes. This finding opens up a straightforward avenue for optimizing high frequency properties of magnetic nanomaterials. (C) 2017 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