Effect of Ni substitution on phase transition, crystal structure and magnetic properties of nanostructured YFeO3 perovskite

Single-phase nanostructured YFe1-xNixO3 (x = 0.1; 0.15; 0.2 and 0.25) perovskites were formed after annealing a mixture of precipitated hydroxides at 800 degrees C for 1 h. The results showed that at the amount of Ni substitution over 0.3, NiO and Y2O3 phases were formed in parallel with the YFeO3 phase. Moreover, as the amount of Ni substitution increased in the range of 0.1-0.5, the crystal sizes increased from 20 +/- 3 to 22 +/- 3 nm, while unit cell volumes decreased from 223.8 to 223.6 angstrom(3). The magnetic parameters (H-c, M-r, M-s) of the nanostructured Ni-doped YFeO3 perovskites were quite higher than those of pure YFeO3, as well as of YFeO3 doped Ca or Co. As the amount of Ni substitution is in the range of 0.1-0.25, H-c decreased from 1332.6 to 887.9 Oe, while M-s increased from 0.67 to 1.18 emu/g and M-r increased from 1.8.10(-1) to 3.2.10(-1) emu/g. (C) 2020 Elsevier B.V. All rights reserved.