| Abstract Scope |
Magnetic refrigeration (MR) offers a highly efficient, environmentally friendly alternative to conventional cooling methods. Among magnetocaloric materials (MCMs), ferromagnetic manganites with the general formula R₁₋ₓTₓMnO₃ (R = rare-earth, T = transition metal) are promising candidates due to their tunable Curie temperatures (100–350 K), low density, and ease of fabrication. This study evaluates and ranks hundreds of R₁₋ₓTₓMnO₃ compositions using multiple-attribute decision-making (MADM) and advanced statistical (AS) methods. Key magnetocaloric properties considered include magnetic entropy change, refrigerant capacity, Curie temperature, and so forth. MADM techniques—Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), Grey Relational Analysis (GRA), and Operational Competitive Ratio (OCR)—produced consistent rankings. AS methods further validated the results, clustering materials with similar performance. The integrated approach highlights top-performing R₁₋ₓTₓMnO₃ compositions suitable for both large- and small-scale MR applications, supporting the development of sustainable, high-efficiency cooling technologies. |