Structure, Thermic phase diagram and energy gap of the Zn1-xMnxGa2Se4 Diluted Magnetic Semiconductor Alloys for 0<x<0.10
Keywords:
Alloy, Diluted magnetic semiconductors, phase diagram, energy gapAbstract
Polycrystalline ingots of Zn0.99Mn0.01Ga2Se4, Zn0.93Mn0.07Ga2Se4 and Zn0.91Mn0.09Ga2Se4 diluted magnetic semiconductor alloys were prepared by the direct melt and thermal annealing method. The diffraction lines were indexed and the lattice parameters were calculated. Miller indices are consistent with a tetragonal structure similar to the structure shown by the compound ZnGa2Se4. Differential thermal analysis showed phase transitions which are in agreement with those reported in the phase diagram of the system Zn1-xMnxGa2Se4. Spectra transmission were obtained and the absorption coefficients of each alloy were calculated. The analysis showed direct gap materials which energy gap values are close to those reported for the compound ZnGa2Se4.
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Copyright (c) 2012 Rubén Cadenas , Jaime Castro , Gerson Delgado
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