Direct observation of room-temperature electrocaloric and magnetocaloric responses in multicaloric composite filmsRegis de Moraes, Victor (Avtor) Goričan, Ivana (Avtor) Šadl, Matej (Avtor) Benčan, Andreja (Avtor) Dražić, Goran (Avtor) Gyergyek, Sašo (Avtor) Tomc, Urban (Avtor) Kitanovski, Andrej (Avtor) Stern-Taulats, Enric (Avtor) Lünser, Klara (Avtor) Mañosa, Lluís (Avtor) Uršič Nemevšek, Hana (Avtor) multicaloric compositeselectrocaloricmagnetocaloricmulticaloricpowder aerosol depositionthick filmsFor the first time, room-temperature electrocaloric (EC) and magnetocaloric (MC) effects were observed in multicaloric composites using direct characterization methods. By combining the EC ceramic 0.9Pb(Mg▫$_{1/3}$▫Nb▫$_{2/3}$▫)O▫$_{3}$▫–0.1PbTiO▫$_{3}$▫ (PMN–10PT) with the MC La-Fe-Si-Co (LFSC) alloy, the multicaloric films were prepared. The PMN–10PT films exhibited a dielectric permittivity of ∼600, while composites exhibited improved values at ∼700. The room-temperature EC response of composites was ∼0.45 K at 250 kV cm▫$^{−1}$▫, a 32 % enhancement when compared to PMN–10PT films. This enhancement in composite films is attributed to Maxwell-Wagner-type polarization effects, induced by the embedded LFSC MC particles. The room-temperature MC response of composite films was directly characterized, achieving a MC response ∼1.4 K at 2 T, after corrections. Our results bring novel insights on the feasibility of preparing multicaloric composites with enhanced caloric properties for room-temperature micro-cooling technologies.20262026-06-15 12:30:02Članek v reviji183569sl