Substrate clamping effect onto magnetoelectric coupling in multiferroic BaTiO3-CoFe2O4 core-shell nanofibers via coaxial electrospinningBi Fu, Ruie Lu, Kun Gao, Yaodong Yang and Yaping WangEPL, 112 2 (2015) 27002DOI: https://doi.org/10.1209/0295-5075/112/27002