Abstract
The spin reorientation transitions (SRTs) were investigated in DyFe12−xVx (x = 1.5, 2.0, 2.75, 4.0) compounds by a.c. susceptibility vs. temperature measurements. The SRT temperature is shifted towards lower values with increasing vanadium content from TSR = 170 K for x = 1.5 to TSR = 125 K for x = 2.75. The crystal field parameter A20 was calculated taking into account the preference of the 8(i) crystal site and considering the nearest neighbourhood of the rare earth ion. Charges of surrounding Fe and V atoms were established by applying the chemical bond model proposed by Pauling. The absolute value of the A20 parameter decreases when the content of vanadium increases in the 8(i) position which explains the TSR shift.
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