“…12,13 Several techniques are used for the synthesis of NiFe 2 O 4 , such as hydrothermal, [14][15][16][17] sol-gel, [18][19][20] and sonochemical, 21,22 co-precipitation is also used to produce nickel ferrite nanoparticles. 23,24 . The ceramic method is still the most common and widely used technique for the production of nickel ferrite particles, by mixing the oxidized raw materials and sintering at high temperature.…”