Numerical performance analysis of an active magnetic regenerator based on Fe doped La–A–Ca manganite oxides (A = Sr, Ba)

• Magnetic and magnetocaloric properties of Fe doped La–A–Ca manganite were studied. • A one-dimensional AMR model was developed and validated using Gd as reference. • Key operating parameters controlling AMR performance were identified and analyzed. Active magnetic regeneration is a key enabling technology for extending the operating temperature span of magnetic refrigeration systems across a wide temperature range. In this work, the thermodynamic performance of an active magnetic regenerator (AMR) based on L a 0.65 A 0.25 C a 0.1 M n 0.99 F e 0.01 O 3 manganite oxides is investigated using a one-dimensional numerical model. The model incorporates experimentally determined magnetocaloric properties derived from isothermal magnetization and heat capacity measurements, allowing a system-level assessment of the cooling performance. Gadolinium is used as a reference material to validate the numerical approach, with its magnetocaloric properties obtained from a mean-field theory description. The results indicate that, due to their moderate magnetocaloric response, the studied manganite oxides require relatively high magnetic fields ( 7 T) to reach cooling performances comparable to those achieved by gadolinium under permanent-magnet fields. Nevertheless, owing to their broad operating temperature range, these materials are capable of generating an AMR temperature span of approximately 30 - 40 K under a magnetic field of 2 T. These results highlight the thermodynamic trade-offs between magnetic field strength, temperature span, and material properties that govern AMR operation, and provide insight into the realistic potential and limitations of manganite-based materials for regenerative magnetic refrigeration systems.