Influence of the surface chemistry on the electric-field control of the magnetization of ultrathin films

N. Tournerie, A. P. Engelhardt, F. Maroun, and P. Allongue
Phys. Rev. B 86, 104434 – Published 28 September 2012

Abstract

In this paper we investigate the voltage dependence of magnetization anisotropy on electrodeposited Co/Au(111) ultrathin films using in situ real-time polar magneto-optical Kerr effect. A systematic voltage and thickness-dependent study is conducted, demonstrating that the magnetoelectric effects arise from an electric field-induced change in the surface anisotropy. The effect is linear, reversible, and can be as large as 50%. We also show that its amplitude depends on the surface chemistry of the Co films. Another kind of magnetoelectric is also reported and discussed that allows a reversible and complete spin reorientation transition in a 5.6-monolayer-thick layer covered with carbon monoxide.

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  • Received 12 April 2012

DOI:https://doi.org/10.1103/PhysRevB.86.104434

©2012 American Physical Society

Authors & Affiliations

N. Tournerie*, A. P. Engelhardt, F. Maroun, and P. Allongue

  • Physique de la Matière Condensée, Ecole Polytechnique, CNRS, 91128 Palaiseau, France

  • *Present address: Laboratoire Matériaux et Génie Industriel, ECAM Rennes–Louis de Broglie, Campus de Ker Lann, 35091 Rennes, France; nicolas.tournerie@ecam-rennes.fr
  • Present address: Computational Electronics and Photonics Group, Electrical Engineering Department and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Wilhelmshöher Allee 71, 34121 Kassel, Germany; andreas.engelhardt@uni-kassel.de
  • Corresponding author: fouad.maroun@polytechnique.fr

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Issue

Vol. 86, Iss. 10 — 1 September 2012

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