Magnetic properties of GaAs:Mn self-assembled nanostructures grown at relatively high-temperature by Molecular Beam Epitaxy
| Autor: | C.F. Sánchez-Valdés, A. Del Río-De Santiago, J.L. Sánchez Llamazares, Víctor Hugo Méndez-García, E. Cruz-Hernández, M. A. Vidal, Máximo López-López |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Nanostructure Analytical chemistry 02 engineering and technology Magnetic semiconductor Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetization Ferromagnetism Nanocrystal 0103 physical sciences Surface layer 0210 nano-technology Molecular beam epitaxy |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 475:715-720 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2018.12.030 |
| Popis: | We report the influence of the Mn atomic concentration (at.%) on the nanostructures formation and magnetic properties of GaAs:Mn layers grown by Molecular Beam Epitaxy at a relatively high substrate temperature of 530 °C varying the nominal Mn at.% content from 0.01 to 0.2. It is shown that by modifying the Mn at.% different kind of nanostructures, ranging from 2D (such as islands and surface corrugation) to 3D microleave- and nanowire-like arrays, form on the surface layer. Samples produced with Mn contents ranging from 0.02 to 0.20 at.% show a significant room temperature ferromagnetic response that is attributed to the formation of MnAs nanocrystals as confirmed from X-ray diffraction analysis and magnetization measurements. The influence of MnAs clusters on the formation of the nanostructures observed is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect