Strain-gradient effects in nanoscale-engineered magnetoelectric materials - Nicolenco, Aliona (Universitat Autònoma de Barcelona. Departament de Física) ; de h-Óra, Muireann (University of Cambridge. Department of Materials Science and Metallurgy) ; Driscoll, Judith (University of Cambridge. Department of Materials Science and Metallurgy) ; Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)