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Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies

Publication ,  Journal Article
Moyer, JA; Vaz, CAF; Arena, DA; Kumah, D; Negusse, E; Henrich, VE
Published in: Physical Review B - Condensed Matter and Materials Physics
August 15, 2011

The magnetic properties of iron-doped cobalt ferrite (Co 1-xFe2+xO4) (001) thin films grown epitaxially on MgO (001) substrates are investigated by superconducting quantum interference device magnetometry and soft x-ray magnetic linear and circular dichroisms. All Co1-xFe2+xO4 (0.01 ≤ x ≤ 0.63) samples have out-of-plane magnetic easy axes and large coercive fields, unlike Fe 3O4, due to a large Co2+ orbital moment. The magnetic moments for those samples are significantly reduced from their bulk values; however, as x increases, the magnetic moments tend nearer to their bulk values and increase more rapidly as x approaches 1. This reduction in magnetic moment is attributed to spin canting among the Co2+ cations, owing to a small in-plane tensile strain in the film and to an increased antiferromagnetic alignment among all the cations caused by a partially inverse spinel cubic structure and the likely presence of antiphase boundaries. Our results show that small changes in stoichiometry can lead to significant changes in the magnetic moment of Co1-xFe2+xO4, especially at large values of x. © 2011 American Physical Society.

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Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

August 15, 2011

Volume

84

Issue

5

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Moyer, J. A., Vaz, C. A. F., Arena, D. A., Kumah, D., Negusse, E., & Henrich, V. E. (2011). Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies. Physical Review B - Condensed Matter and Materials Physics, 84(5). https://doi.org/10.1103/PhysRevB.84.054447
Moyer, J. A., C. A. F. Vaz, D. A. Arena, D. Kumah, E. Negusse, and V. E. Henrich. “Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies.” Physical Review B - Condensed Matter and Materials Physics 84, no. 5 (August 15, 2011). https://doi.org/10.1103/PhysRevB.84.054447.
Moyer JA, Vaz CAF, Arena DA, Kumah D, Negusse E, Henrich VE. Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies. Physical Review B - Condensed Matter and Materials Physics. 2011 Aug 15;84(5).
Moyer, J. A., et al. “Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies.” Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 5, Aug. 2011. Scopus, doi:10.1103/PhysRevB.84.054447.
Moyer JA, Vaz CAF, Arena DA, Kumah D, Negusse E, Henrich VE. Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies. Physical Review B - Condensed Matter and Materials Physics. 2011 Aug 15;84(5).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

August 15, 2011

Volume

84

Issue

5

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences