Uniaxial magnetic anisotropy energy of fe wires embedded in carbon nanotubes

Francisco Muñoz, Jose Mejía-López, Tomas Pérez-Acle, Aldo H. Romero

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In this work, we analyze the magnetic anisotropy energy (MAE) of Fe cylinders embedded within zigzag carbon nanotubes, by means of ab initio calculations. To see the influence of the confinement, we fix the Fe cylinder diameter and we follow the changes of the MAE as a function of the diameter of the nanotube, which contains the Fe cylinder. We find that the easy axis changes from parallel to perpendicular, with respect to the cylinder axis. The orientation change depends quite strongly on the confinement, which indicates a nontrivial dependence of the magnetization direction as function of the nanotube diameter. We also find that the MAE is affected by where the Fe cylinder sits with respect to the carbon nanotube, and the coupling between these two structures could also dominate the magnetic response. We analyze the thermal stability of the magnetization orientation of the Fe cylinder close to room temperature.

Original languageEnglish
Pages (from-to)2883-2891
Number of pages9
JournalACS Nano
Volume4
Issue number5
DOIs
Publication statusPublished - 25 May 2010

Keywords

  • Carbon nanotubes
  • Encapsulated metal nanowires
  • Magnetic arrangement
  • Magneto-anisotropy

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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    Muñoz, F., Mejía-López, J., Pérez-Acle, T., & Romero, A. H. (2010). Uniaxial magnetic anisotropy energy of fe wires embedded in carbon nanotubes. ACS Nano, 4(5), 2883-2891. https://doi.org/10.1021/nn901834z