%0 Journal Article %J IEEE Magnetics Letters %D 2021 %T Magnetic and magnetoelastic properties of Ni-substituted cobalt ferrite %A Bhame, Shekhar D. %A Shirolkar, Mandar M. %A Joy, Pattayil A. %K Ferrite %K Magnetism in solids %K Magnetostriction %K oxide %K stress sensing %X In this letter, magnetic and magnetostriction studies were performed on spinel ferrite Co1-xNixFe2O4 (CNF series) with 0.0 < x < 0.5. All the samples were synthesized by the conventional ceramic method and confirmed to be forming pure spinel phase. The unit cell parameter showed gradual decrease with increasing Ni content. A linear decrease in saturation magnetization (M-s) and coercivity (H-c) was observed with increasing Ni substitution, which could be attributed to reduced magneto-crystalline anisotropy. The room temperature magnetostriction studies revealed a slow decrease in maximum magnetostriction, and interestingly, for 20% reduction of cobalt concentration, i.e., for x = 0.2, a magnetostrictive strain of -164 ppm and substantially high stress sensitivity of -56 x 10(-6) A(-1) m were observed, making Co0.8Ni0.2Fe2O4 suitable for application as a magnetostrictive stress-sensing material. %B IEEE Magnetics Letters %V 12 %P 2504205 %8 JAN %G eng %9 Article %3 Foreign %4 1.549 %R 10.1109/LMAG.2021.3120942