High magnetostriction with low saturation field in highly ⟨0 0 1⟩ textured CoFe2O4 by magnetic field alignment

We report the magnetostriction and < 0 0 1 > texture of anisotropic polycrystalline CoFe2O4. Slurries with well dispersion and low sintering shrinkage are aligned by the magnetic field of 2 T and sintered to prepare highly < 0 0 1 > textured CoFe2O4 samples. For the anisotropic sample, benefiting from the < 0 0 1 > fiber texture, a higher magnetostrictive property is achieved than that of isotropic polycrystalline sample prepared by dry compaction. The maximum magnetostriction up to -500 ppm at 1000 Oe is obtained, which reaches 85% of the highest value in single crystal (lambda(100) = -590 ppm). Meanwhile, the maximum strain-field derivative is also improved to -0.97 ppm/Oe at 250 Oe, which is highly beneficial for sonar detector and force sensor applications. (C) 2018 Elsevier B.V. All rights reserved.