Transport and Magnetic Properties of Low Temperature Annealed Ga1-xMnxAs
| Autor: | B. Raquet, I. Kuryliszyn, Xiaofeng Liu, H. Rakoto, Jacek K. Furdyna, Witold Dobrowolski, J.-M. Broto, Oliver Portugall, Tomasz Wojtowicz, Michel Goiran |
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| Rok vydání: | 2002 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Annealing (metallurgy) General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Electrical resistivity and conductivity 0103 physical sciences Curie Narrow range Curie temperature 0210 nano-technology Molecular beam epitaxy |
| Zdroj: | Acta Physica Polonica A. 102:659-665 |
| ISSN: | 1898-794X 0587-4246 |
| DOI: | 10.12693/aphyspola.102.659 |
| Popis: | We present the results of low temperature annealing studies of Ga 1 - x Mn x As epilayers grown by low temperature molecular beam epitaxy in a wide range of Mn concentrations (0.01 < x < 0.084). Transport measurements in low and high magnetic fields as well as SQUID measurements were performed on a wide range of samples, serving to establish optimal conditions of annealing. Optimal annealing procedure succeeded in the Curie temperatures higher than 110 K. The highest value of the Curie temperature estimated from the maximum in the temperature dependence of zero-field resistivity (Tp) was 127 K. It is generally observed that annealing leads to large changes in the magnetic and transport properties of GaMnAs in the very narrow range of annealing temperature close to the growth temperature. |
| Databáze: | OpenAIRE |
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