CuO Nanoparticles as a Room Temperature Dilute Magnetic Giant Dielectric Material

We report the structure, magnetic and dielectric properties of CuO nanoparticles synthesized by co-precipitation method. The magnetic measurements reveal the presence of a ferromagnetic (FM) component at room temperature with coercivity of 200 Oe and saturation magnetization of 0.004 emu/g. The obse...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2011-10, Vol.47 (10), p.3772-3775
Main Authors: Chen, J. W., Rao, G. Narsinga
Format: Article
Language:English
Subjects:
Coercivity
Cross-disciplinary physics: materials science
rheology
CuO nanoparticles
Dielectrics
Exact sciences and technology
ferromagnetic
Frequency measurement
Frequency modulation
giant dielectric permittivity
Materials science
Nanoparticles
Other topics in materials science
Permittivity
Physics
Saturation magnetization
Temperature measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the structure, magnetic and dielectric properties of CuO nanoparticles synthesized by co-precipitation method. The magnetic measurements reveal the presence of a ferromagnetic (FM) component at room temperature with coercivity of 200 Oe and saturation magnetization of 0.004 emu/g. The observed FM may originate from different valence states of the copper ions due to the oxygen vacancies at the surface/or interface of the particles. In addition, these nanoparticles also exhibit a high dielectric permittivity (ε ' ~ 10 4 ) with weak temperature dependence in a wide range of temperature. Such a room temperature FM and giant dielectric permittivity without the presence of any transition metal could be a very good option for a class of spintronics.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2149505