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<p>In order to better understand how Mn-doped LaCoO<sub>3</sub> perovskites might be used in magnetic refrigeration technology, this study looks into their magnetic characteristics. Temperature-dependent magnetization tests show that when temperature decreases, paramagnetic behavior changes to ferromagnetic behavior, with higher Mn doping levels leading to an increase in the ferromagnetic Curie transition temperature (<i>T</i><sub>C</sub>). Mn doping increases total magnetization. Isothermal magnetization (M-H) curves show ferromagnetic behavior below <i>T</i><sub>C</sub> and paramagnetic nature above <i>T</i><sub>C</sub>. Based on M-H curves, the magnetic entropy change (Δ<i>S</i><sub>M</sub>) is computed and results reveal increasing values with higher Mn doping levels, suggesting enhanced magnetization and ferromagnetic interaction for <i>x</i> = 0.1 sample. Potential for magnetic refrigeration applications is suggested by a broad range of Δ<i>S</i><sub>M</sub> at low temperatures. Promising refrigeration capabilities are demonstrated by the relative cooling power (RCP) values of 7.6&#xa0;J/kg and 11.6&#xa0;J/kg for varying degrees of Mn doping.</p>

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Unveiling the Temperature-Dependent Magnetic and Magnetocaloric Properties in Mn-Doped LaCoO3

  • 期刊论文

  • 发表日期：

    2025年7月9日

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  • S. Esakki Muthu,
  • Kalaiselvan Ganesan,
  • Jhelai Sahadevan,
  • P. Sakthivel,
  • A. Viji,
  • P. Sivaprakash,
  • Ikhyun Kim

摘要

In order to better understand how Mn-doped LaCoO3 perovskites might be used in magnetic refrigeration technology, this study looks into their magnetic characteristics. Temperature-dependent magnetization tests show that when temperature decreases, paramagnetic behavior changes to ferromagnetic behavior, with higher Mn doping levels leading to an increase in the ferromagnetic Curie transition temperature (TC). Mn doping increases total magnetization. Isothermal magnetization (M-H) curves show ferromagnetic behavior below TC and paramagnetic nature above TC. Based on M-H curves, the magnetic entropy change (ΔSM) is computed and results reveal increasing values with higher Mn doping levels, suggesting enhanced magnetization and ferromagnetic interaction for x = 0.1 sample. Potential for magnetic refrigeration applications is suggested by a broad range of ΔSM at low temperatures. Promising refrigeration capabilities are demonstrated by the relative cooling power (RCP) values of 7.6 J/kg and 11.6 J/kg for varying degrees of Mn doping.