Rashba Spin-Orbit Anisotropy and the Electric Field Control of Magnetism
| Autor: | Sadamichi Maekawa, Jun'ichi Ieda, Stewart E. Barnes |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Condensed Matter - Materials Science Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Field (physics) Magnetism Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Article Magnetic anisotropy Ferromagnetism Electric field Magnet Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Condensed Matter::Strongly Correlated Electrons Surface charge Anisotropy |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep04105 |
| Popis: | The control of the magnetism of ultra-thin ferromagnetic layers using an electric field rather than a current, if large enough, would lead to many technologically important applications. To date, while it is usually assumed the changes in the magnetic anisotropy, leading to such a control, arises from surface charge doping of the magnetic layer, a number of key experiments cannot be understood within such a scenario. Much studied is the fact that, for non-magnetic metals or semi-conductors, a large surface electric field gives rise to a Rashba spin-orbit coupling which leads to a spin-splitting of the conduction electrons. For a magnet, this splitting is modified by the exchange field resulting in a large magnetic anisotropy energy via the Dzyaloshinskii-Moriya mechanism. This different, yet traditional, path to an electrically induced anisotropy energy can explain the electric field, thickness, and material dependence reported in many experiments. 12 pages, 2 figures |
| Databáze: | OpenAIRE |
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