Influence of cobalt on spin reorientation in YFe1-xCoxO3and YFe1-xCox/2Tix/2O3single crystals grown by the floating zone technique

The spin reorientation temperature (Tr) has been measured on Co and Co-Ti substituted YFeO3single crystals grown by the floating zone method. For YFe1-xCoxO3with an x of up to 0.02, no spin reorientation has been observed above 77 K. On the contrary, Trdepended strongly on small x for YFe1-xCox/2Tix/2O3. The magnetic anisotropy of YFeO3was found to be markedly influenced by Co²⁺, whose contribution was accounted for by the single ion model, having one ion anisotropy energy of approximately 65 cm^-1/ion.