Ferromagnetism evidence and size dependence in ferroelectric PZN-4.5PT nanoparticles Rémi Ndioukane, Moussa Touré, Diouma Kobor, Yoann Lalatonne, Laurence Motte, Laurent Lebrun, Marin Tadic and Fabrice Wilhelm EPL, 125 4 (2019) 47004 Published online: 22 March 2019 DOI: 10.1209/0295-5075/125/47004