On the Neel temperature and magnetic domain wall movements of Ga2-xFexO3 single crystals grown by floating-zone technique

Single crystals of piezoelectric ferrimagnet, Gallium ferrite Ga-2 xFexO3 ( x = 0.8, 1.0 and 1.2) were grown by optical floating zone technique. Phase confirmation was done by X-ray diffraction and the lattice parameters were determined via Rietveld refinement which shows a linear variation. Composition of the grown crystals was confirmed by energy dispersive X-ray spectra. Temperature and frequency dependent dielectric spectra have been used to explain the conduction mechanism in Ga2-xFexO3 single crystals. Dielectric constant of 1610 was obtained for GaFeO3 (x = 1) and increases with x. With increasing iron concentration, a linear increase in T-N is observed and the crystals transform as softer magnets. (C) 2013 Elsevier B.V. All rights reserved.