Magnetostriction properties of oriented polycrystalline CoFe2O4

Oriented polycrystalline CoFe2O4 have been prepared via a ceramic method. The CoFe2O4 powder was mixed with polyvinyl alcohol solution to produce semisolid slurries. The slurries were oriented under a magnetic field of 2 T, and were then sintered at 1623 K. The maximum magnetostriction λs up to −270×10−6 and strain derivative (dλ/dH)max of 7.7×10−9 m/A were achieved for oriented samples. Results show that a preferred <001> orientation has been obtained within oriented sample.