Uniaxial magnetic anisotropy of cobalt films deposited on sputtered MgO(001) substrates

Kai Chen, Robert Frömter, Stefan Rössler, Nikolai Mikuszeit, and Hans Peter Oepen
Phys. Rev. B 86, 064432 – Published 22 August 2012

Abstract

We present a systematic investigation of the in-plane uniaxial magnetic anisotropy induced by the morphology due to ion erosion of MgO(001). Ion milling at oblique incidence forms a ripple structure on the MgO surface the grooves run along the ion beam direction. Ultrathin cobalt films grown on such templates show a dominant uniaxial magnetic anisotropy with the easy axis along the ion beam direction. Both the strength of anisotropy and its symmetry can be controlled via the milling conditions, allowing one to fine-tailor the anisotropy in magnetic films. A uniaxial, volumelike anisotropy contribution is found, which is explained by the modulation of the magnetization perpendicular to the ripples that causes an increase of exchange energy.

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  • Received 26 April 2012
  • Publisher error corrected 24 August 2012

DOI:https://doi.org/10.1103/PhysRevB.86.064432

©2012 American Physical Society

Corrections

24 August 2012

Erratum

Publisher's Note: Uniaxial magnetic anisotropy of cobalt films deposited on sputtered MgO(001) substrates [Phys. Rev. B 86, 064432 (2012)]

Kai Chen, Robert Frömter, Stefan Rössler, Nikolai Mikuszeit, and Hans Peter Oepen
Phys. Rev. B 86, 059906 (2012)

Authors & Affiliations

Kai Chen1,3,*, Robert Frömter1, Stefan Rössler1, Nikolai Mikuszeit2, and Hans Peter Oepen1

  • 1Institut für Angewandte Physik, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany
  • 2Instituto Madrileño de Estudios Avanzados en Nanociencia, IMDEA-Nanociencia, Campus Universidad Autónoma de Madrid, 28049 Madrid, Spain
  • 3Institute for Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany

  • *Corresponding author: kai.chen@hzg.de

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Issue

Vol. 86, Iss. 6 — 1 August 2012

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