Magnetoelastic coupling in epitaxial cobalt ferrite/barium titanate heterostructures

► Ultra-thin CoFe2O4 films grown on ferroelectric BaTiO3 crystals by PLD. ► Magnetic response to structural changes of BaTiO3 at transition temperatures. ► Significant magneto-elastic coupling of in-plane magnetisation in SQUID experiments. ► Clear distinction between contribution by BaTiO3 substrate and by CoFe2O4 film.