Abstract
A Raman study of order‐disorder phenomena in the diluted magnetic semiconductors Zn1−xMnxGa2Se4 series (0⩽x⩽1) is presented. The end compounds ZnGa2Se4 and MnGa2Se4 crystallize in the I42m and I4 space groups respectively, presenting either partial cation disorder (I42m) or total cation order (I4). In this work, a relation between the shape of a mode at ν≅180 cm−1 and the degree of cation order has been found. This band can be decomposed in a narrow and a broad component, related with the long range order and local non periodicity respectively. Cation ordering has been seen to increase after a heating treatment up to 600 °C and further cooling to RT.
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