Abstract
The electrical and magnetic properties of GaSb:Mn layers deposited on (100)GaAs substrates from a laser plasma in vacuum have been studied. It is shown that the films deposited at 200–440 °C are mosaic single crystalline and epitaxial to the substrate, with p-type conduction. Manganese-doped layers had a hole concentration higher than 1×1019 cm−3 and fairly high values of mobility (up to 40 cm2/V s at 300 K). The layers grown at 200 °C exhibited an anomalous Hall effect up to approximately room temperature. On the contrary, a normal Hall effect was observed in the layers grown at 440 °C. Ferromagnetic resonance measurements have revealed the existence of ferromagnetism in the sample grown at 200 °C. The transition temperature is close to room temperature, in full agreement with the Hall data. In the sample grown at 440 °C, the formation of ferromagnetic clusters has tentatively been concluded.
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Sobolev, N.A., Oliveira, M.A., Rubinger, R.M. et al. Ferromagnetic Resonance and Hall Effect Characterization of GaMnSb Layers. J Supercond Nov Magn 20, 399–403 (2007). https://doi.org/10.1007/s10948-007-0243-6
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DOI: https://doi.org/10.1007/s10948-007-0243-6