Magnetic properties of self-assembled Co nanorods grown on Cu (110) - (2×3) N

Xiao Dong Ma, Takeshi Nakagawa, Yasumasa Takagi, Marek Przybylski, Fred M. Leibsle, Toshihiko Yokoyama

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9 Citations (Scopus)

Abstract

Structural and magnetic properties of self-assembled Co nanorods on a Cu (110) - (2×3) N surface have been investigated by low-energy electron diffraction (LEED), Auger-electron spectroscopy (AES), magneto-optical Kerr effect (MOKE), and x-ray magnetic circular dichroism (XMCD). The LEED observation confirms that the Co nanorod grows epitaxially along the [1 1̄ 0] axis and its interval exhibits the (1×6) periodicity. The AES clarifies that the N atom locates always at the surface even after 5 monolayer (ML) Co deposition. Angle dependent magnetization curves of the Co nanorods recorded by MOKE and XMCD show that the magnetic easy axis is perpendicular to the rod within the substrate plane, irrespective of the Co thickness down to 0.8 ML. This implies that the magnetic anisotropy is not dominated by the shape anisotropy but by the magnetocrystalline anisotropy. The XMCD sum-rule analysis reveals significant enhancement of the orbital magnetic moment along the easy axis compared to the hard axes. The magnetocrystalline anisotropy is found to be directly related to the anisotropy of the orbital magnetic moment.

Original languageEnglish
Article number104420
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number10
DOIs
Publication statusPublished - Sep 24 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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