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Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Magnetic Nanoparticles

J. Appl. Phys. 111, 07B546 (2012); http://dx.doi.org/10.1063/1.3688933 (3 pages)

Concentration dependence of magnetic moment in Ce1-xFexO2

Geoffrey L. Beausoleil, II, Aaron Thurber, S. S. Rao, Gordon Alanko, C. B. Hanna, and Alex Punnoose

Department of Physics, Boise State University, Boise, Idaho 83725, USA

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(Received 21 September 2011; accepted 3 January 2012; published online 15 March 2012)

In this study, we examined the impact of iron doping on the structural, chemical, and magnetic properties of ceria (Ce1-xFexO2). Samples were produced in triplicate through a coprecipitation approach in a forced hydrolysis synthesis that yielded consistently sized nanocrystals using three different cerium precursors: cerium chloride, cerium ammonium nitrate, and cerium nitrate. Particles were characterized by x ray diffraction (XRD), x ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, and vibrating sample magnetometry (VSM). XPS and EPR data shows iron to be in the Fe3+ state and confirms the nominal dopant concentration. The moment per Fe ion found was largest at the lowest dopant concentrations, and quickly decreased as the concentration was increased. We used XPS to estimate the Ce3+/Ce4+ ratio and observed a linear relation between the saturation magnetization and the Ce3+/Ce4+ ratio.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS AND DISCUSSION
  4. CONCLUSION

RELATED DATABASES

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KEYWORDS, PACS, and IPC

Keywords

cerium compounds, doping profiles, iron, magnetic moments, magnetisation, nanofabrication, nanomagnetics, nanostructured materials, paramagnetic resonance, precipitation (physical chemistry), transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectra

PACS

  • 75.75.Cd

    Fabrication of magnetic nanostructures

  • 75.30.Cr

    Saturation moments and magnetic susceptibilities

  • 75.50.Tt

    Fine-particle systems; nanocrystalline materials

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 76.30.Fc

    Iron group (3d) ions and impurities (Ti-Cu)

  • 79.60.Jv

    Interfaces; heterostructures; nanostructures

International Patent Classification (IPC)

  • B82B1/00

    Nano-structures

  • B82B3/00

    Manufacture or treatment of nano-structures

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

  • H01F13/00

    Apparatus or processes for magnetising or demagnetising

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3688933

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    A. Sundaresan et al., Phys. Rev. B 74, 4 (2006).

    A. Thurber et al., J. Appl. Phys. 101, 3 (2007)JAPIAU00010100000909N506000001.

    A. Thurber et al., Phys. Rev. B 76, 8 (2007).


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