Programme

P.9 -- Posters, VCTP-50

Date: Tuesday, 5 August 2025

Time: 08:30 - 10:00

Monte Carlo Simulation of Magnetocaloric Effects in Doped Perovskites

Phuong-Thuy T. Nguyen (1), V. Thanh Ngo (2)

(1) Institute of Physics, Vietnam Academy of Science and Technology (2) Institute of Scientific Data and Information, Vietnam Academy of Science and Technology

Monte Carlo simulations are performed to study the magnetic behavior of doped perovskite compounds. The model includes both superexchange and double exchange interactions as pairwise exchange terms, along with an additional multi-spin interaction. With the aim of developing magnetocaloric materials that exhibit strong effects over a broad temperature range near room temperature, recent research has focused on doping as an effective strategy to modify magnetic interactions and phase transition behavior. We investigate how doping influences the phase transition temperature and analyze the system’s response to external magnetic fields at various doping levels. Energy histogram analysis is used to examine the characteristics of the phase transition. The magnetic entropy and relative cooling power are determined. The results show good agreement with experimental observations, highlighting the potential of these materials for magnetic refrigeration applications.

Presenter: Nguyen Thi Phuong Thuy