Abstract
The quantitative understanding of converse magnetoelectric effects, i.e., the variation of the magnetization as a function of an applied electric field, in extrinsic multiferroic hybrids is a key prerequisite for the development of future spintronic devices. We present a detailed study of the strain-mediated converse magnetoelectric effect in ferrimagnetic FeO thin films on ferroelectric BaTiO substrates at room temperature. The experimental results are in excellent agreement with numerical simulation based on a two-region model. This demonstrates that the electric field induced changes of the magnetic state in the FeO thin film can be well described by the presence of two different ferroelastic domains in the BaTiO substrate, resulting in two differently strained regions in the FeO film with different magnetic properties. The two-region model allows to predict the converse magnetoelectric effects in multiferroic hybrid structures consisting of ferromagnetic thin films on ferroelastic substrates.
1 More- Received 23 April 2013
DOI:https://doi.org/10.1103/PhysRevB.88.054412
©2013 American Physical Society