Issue 1, 2014

Tuning the surface anisotropy in Fe-doped NiO nanoparticles

Abstract

Ni1−xFexO nanoparticles have been obtained by the co-precipitation chemical route. X-ray diffraction analyses using Rietveld refinement have shown a slight decrease in the microstrain and mean particle size as a function of the Fe content. The zero-field-cooling (ZFC) and field-cooling (FC) magnetization curves show superparamagnetic behavior at high temperatures and a low temperature peak (at T = 11 K), which is enhanced with increasing Fe concentration. Unusual behavior of the coercive field in the low temperature region and an exchange bias behavior were also observed. A decrease in the Fe concentration induces an increase in the exchange bias field. We argue that these behaviors can be linked with the strengthening of surface anisotropy caused by the incorporation of Fe ions.

Graphical abstract: Tuning the surface anisotropy in Fe-doped NiO nanoparticles

Article information

Article type
Paper
Submitted
14 Sep 2013
Accepted
28 Sep 2013
First published
04 Oct 2013

Nanoscale, 2014,6, 352-357

Tuning the surface anisotropy in Fe-doped NiO nanoparticles

K. O. Moura, R. J. S. Lima, A. A. Coelho, E. A. Souza-Junior, J. G. S. Duque and C. T. Meneses, Nanoscale, 2014, 6, 352 DOI: 10.1039/C3NR04926D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements