Direct observation of room-temperature electrocaloric and magnetocaloric responses in multicaloric composite films

Regis 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)

For 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.

• Jezik: Angleški jezik
• Ključne besede: multicaloric composites, electrocaloric, magnetocaloric, multicaloric, powder aerosol deposition, thick films
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 9 str.
• Številčenje: Vol. 46, issue 15, art. 118584
• PID: 20.500.12556/RUL-183569
• UDK: 536.5:620.168
• ISSN pri članku: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2026.118584
• COBISS.SI-ID: 281625091
• Datum objave v RUL: 15.06.2026

Gradivo je del revije

• Naslov: Journal of the European ceramic society
• Skrajšan naslov: J. Eur. Ceram. Soc.
• Založnik: Elsevier
• ISSN: 0955-2219
• COBISS.SI-ID: 6342151

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: multikalorični kompoziti, elektrokalorični odzivi, magnetokalorični odzivi, multikalorične plasti, aerosolno nanašanje prahu, debele plasti