Exploring the effect of co doping in fine maghemite nanoparticles

Fantechi, E., Campo, G., Carta, D., Corrias, A., De Julián Fernández, C., Gatteschi, D., Innocenti, C., Pineider, F., Rugi, F., Sangregorio, C. and others. (2012) Exploring the effect of co doping in fine maghemite nanoparticles. Journal of Physical Chemistry C, 116 (14). pp. 8261-8270. ISSN 1932-7447. (doi:10.1021/jp300806j) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1021/jp300806j

Abstract

We present a study of the structural, magnetic, and magneto-optical properties of a series of Co-substituted ferrite nanoparticles (NPs) prepared by thermal decomposition of metallo-organic precursors in high boiling solvents. The structural characterization, carried out by using several techniques (transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), and magnetic circular dichroism measurements), showed all the samples are high crystalline, 5-6 nm spherical NPs with the cubic spinel structure typical of ferrites. The evolution of lattice parameters with cobalt content suggests that the material is Co-substituted maghemite, also confirmed by XAS and magneto optical (MO) characterizations. The investigation of the magnetic and magneto-optical properties displays peculiar trends with the cobalt content, the main features being the large increase of the saturation magnetization and the anomalous dependence of magnetic anisotropy which reaches its maximum values for intermediate compositions. The large tuneability of this material makes it possible to implement the performances of devices used in biomedical and sensing applications.

Item Type: Article
DOI/Identification number: 10.1021/jp300806j
Uncontrolled keywords: Cobalt content, Cubic spinel structure, Effect of CO, Ferrite nanoparticles, High boiling solvents, Maghemite nanoparticle, Maghemites, Magnetic and magneto-optical properties, Magnetic circular dichroisms, Magneto-optical, Magnetooptical properties, Maximum values, Metallo-organic precursors, Sensing applications, Structural characterization, Transmission electron microscopy (TEM), Cobalt, Decomposition, Ferrite, Ferrites, Iron ores, Magnetos, Nanoparticles, Optical properties, Saturation magnetization, Transmission electron microscopy, X ray absorption spectroscopy, X ray diffraction, Nanomagnetics
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 16 Dec 2014 13:51 UTC
Last Modified: 29 May 2019 13:56 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46164 (The current URI for this page, for reference purposes)
  • Depositors only (login required):