External field-induced caloric effects in liquid crystals from molecular simulation

Aupič, Polona (avtor), Potisk, Tilen (avtor), Svenšek, Daniel (avtor), Skačej, Gregor (avtor)

In the search for alternative, environmentally friendly refrigeration technologies, caloric effects play an important role. Over the past years, liquid crystals have emerged as promising caloric materials. Here, we present a molecular simulation study of the electrocaloric and magnetocaloric effect in liquid crystals exhibiting a nematic–isotropic phase transition. The indirect approach for determining the caloric response is used in combination with molecular dynamics simulations based on the Gay–Berne model. The simulations confirm that the largest response is present at temperatures just above the phase transition and predict the magnitude of the electrocaloric response to be ∼1.6 kJ/kg for an applied electric field of 1600 kV/cm. A much weaker magnetocaloric response is predicted, ∼0.4 kJ/kg for an applied magnetic field of 200 T, indicating that electric fields are much more promising for use in applications than magnetic fields.

• Jezik: Angleški jezik
• Ključne besede: molecular simulations, molecular dynamics, liquid crystals, electrocaloric effect
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Leto izida: 2025
• Št. strani: 044902-1-044902-7
• Številčenje: Vol. 163, iss. 4
• PID: 20.500.12556/RUL-170981
• UDK: 536.91
• ISSN pri članku: 0021-9606
• DOI: 10.1063/5.0287354
• COBISS.SI-ID: 243741955
• Datum objave v RUL: 24.07.2025

Gradivo je del revije

• Naslov: The Journal of chemical physics
• Skrajšan naslov: J. chem. phys.
• Založnik: American Institute of physics
• ISSN: 0021-9606
• COBISS.SI-ID: 5253893

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: molekulske simulacije, molekulska dinamika, tekoči kristali, elektrokalorični pojav