Abstract
The growth of FeGa 2O 4 spinel single crystal by means of the chemical vapour transport technique using chlorine as the transport agent is reported. A thermodynamic study of the FeGa 2O 4-Cl 2 system has been performed and was used to explain the different growth phenomena observed. Moreover, the magnetic and electronic properties were studied by means of magnetic susceptibility measurements, X-ray photoelectron spectroscopy and X-ray induced Auger spectroscopy: (i) FeGa 2O 4 is a partially inverse spinel ( a = 8.388(1) A ̊ ) with 53% of Fe 2+ ions on tetrahedral sites; (ii) XPS and Auger results show the oxygen ion in a single chemical environment that differs significantly from those of FeO and Ga 2O 3 and the surface of the single crystal showed Fe 2+ depletion that was about 20%; (iii) spin-glass freezing is observed at low temperatures ( T f = 12.2 K at v = 116 Hz).
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