Crystal structure and magnetic properties of perovskite YFe1-xMnxO3 nanopowders synthesized BY CO-PRECIPITATION method

摘要

Perovskite YFe1-xMnxO3 nanopowders (0.1 <= x <= 0.4) were synthesized by the co-precipation method in which the hydrate process of Y(III), Fe(III) and Mn(II) cations in boiling water took place. After annealing at 800 degrees C for 1 h, the nano YFe1-xMnxO3 materials had the single phase of YFe1-xMnxO3. The results showed that in the range of Mn (II). from 0.1 to 0.4, the materials had the indexes of crystal size (D-XRD = 23.61 divided by 22.95 nm), lattice constant (a = 5.5932 divided by 5.6744 angstrom, b = 7.7373 divided by 7.5194 angstrom, c = 5.3014 divided by 5.2592 angstrom, and V = 229.425 divided by 224.4012 angstrom(3)), saturation magnetization (M-s = 2.19 divided by 1.12 emu/g), maximum energy product ((BH)(max) = 2.19 divided by 1.12 emu/g), coercive force (H-c = 56.94 divided by 150.95 Oe), remanent magnetization (M-r = 0.23-0.50 emu/g). When increasing the amount of Mn (II), the indexes of crystal size, lattice constant (b, c, V), saturation magnetization and maximum energy product decreased; while those of coercive force, remnant magnetization and lattice constant (a) increased.