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.
- Received 12 April 2012
DOI:https://doi.org/10.1103/PhysRevB.86.104434
©2012 American Physical Society