Lafuerza, Sara Blasco, Javier Evangelisti, Marco Subías, Gloria Gracia, David Pardo, José Á. Barriuso, Eduardo Torrelles, Xavier Padilla-Pantoja, Jessica Caicedo, José M. Santiso, José High‐quality epitaxial five‐layer aurivillius films with in‐plane ferroelectricity for electrocaloric cooling Adv. Electron. Mater. 10.1002/aelm.202400962 2025 2025