Abstract
A study of the Raman spectra and X‐ray diffraction on Cu2MnGeS4 magnetic quaternary semiconductor compound with wurtz‐stannite‐type structure (space group Pmn21) has been done. By considering group theory analysis and by comparing the Raman lines with those obtained from far infrared measurements found in the literature, as well as with experimental and calculated lines for Cu2ZnGeS4, a tentative symmetry assignment of the Raman lines observed for has also been made. The five strongest Raman lines observed at 355, 296, 308, 388 and 408 cm−1 have been assigned to sulphur‐related A1‐symmetry modes, and at 170 and 260 cm−1 to the Mn‐related A1 modes. Also, lines at 98, 105 and 150 cm−1 are assigned to A2‐, B1‐, and Mn‐related B2‐symmetry modes, respectively. In addition, weak lines at 124, 208 and 238 cm−1 were assigned to the orthorhombic GeS secondary phase.
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