Structural and magnetic properties of GeMn layers; High Curie temperature ferromagnetism induced by self organized GeMn nano-columns
| Autor: | J. Rothman, Thibaut Devillers, Serge Tatarenko, P. Bayle Guillemaud, A. Barski, V. Poydenot, E. Bellet Amalric, M. Jamet, Richard Mattana, Joel Cibert, R. Dujardin |
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| Rok vydání: | 2007 |
| Předmět: |
Condensed matter physics
Chemistry chemistry.chemical_element Germanium Surfaces and Interfaces Magnetic semiconductor Condensed Matter Physics Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ferromagnetism Impurity Hall effect Nano Materials Chemistry Curie temperature Electrical and Electronic Engineering |
| Zdroj: | physica status solidi (a). 204:130-135 |
| ISSN: | 1862-6319 1862-6300 |
| DOI: | 10.1002/pssa.200673026 |
| Popis: | In this paper we report on the structural and magnetic properties of GeMn layers grown on Ge(001). We show that for the optimized Mn concentration (6%) and for optimized growth temperature (close to 130 °C), GeMn samples exhibit a high Curie temperature (higher than 400 K) and Anomalous Hall Effect up to room temperature. Our GeMn layers grown at low temperature (70 °C to 130 °C) are composed of vertical Mn-rich nano-colums. Samples grown at temperatures higher than 130 °C contain GeMn nano-clusters. |
| Databáze: | OpenAIRE |
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