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<p>The structural, magnetic, and magnetocaloric properties of Pr(Co<sub>1-x</sub>Mn<sub>x</sub>)<sub>2</sub> (x = 0.0 to 0.12) compounds were systematically investigated using X-ray powder diffraction and magnetic measurements. All samples crystallized in single Laves phase with a cubic MgCu<sub>2</sub>-type structure. The low-field thermomagnetic curves revealed a spin glass-like state at low temperature. Upon Mn doping in PrCo<sub>2</sub> compound, the Curie temperature (<i>T</i><sub>C</sub>) for the ferromagnetic to paramagnetic transition increased significantly from 42&#xa0;K for x = 0.0 up to 70&#xa0;K for x = 0.12, accompanied by minimal thermal and magnetic hysteresis. Arrott plots confirmed that all samples underwent second-order phase transitions. The maximum magnetic entropy changes (׀Δ<i>S</i><sub>M</sub>׀) under a field change from 0 to 5&#xa0;T were measured as 10.66, 9.02, 5.41 and 4.64&#xa0;J/kg·K for x = 0.0, 0.04, 0.08 and 0.12, respectively. Corresponding, the relative cooling power values were calculated to be 172.43, 161.44, 152.76 and 138.09&#xa0;J/kg. These findings suggest that Pr(Co<sub>1-x</sub>Mn<sub>x</sub>)<sub>2</sub> compounds are promising candidates for magnetic refrigeration applications at intermediate temperatures.</p>

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Spin glass-like behavior and magnetocaloric properties in Pr(Co1-xMnx)2 compounds with second-order magnetic phase transition

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • M. F. He,
  • L. Ma,
  • D. Wang,
  • Y. L. Zheng,
  • H. Ran

摘要

The structural, magnetic, and magnetocaloric properties of Pr(Co1-xMnx)2 (x = 0.0 to 0.12) compounds were systematically investigated using X-ray powder diffraction and magnetic measurements. All samples crystallized in single Laves phase with a cubic MgCu2-type structure. The low-field thermomagnetic curves revealed a spin glass-like state at low temperature. Upon Mn doping in PrCo2 compound, the Curie temperature (TC) for the ferromagnetic to paramagnetic transition increased significantly from 42 K for x = 0.0 up to 70 K for x = 0.12, accompanied by minimal thermal and magnetic hysteresis. Arrott plots confirmed that all samples underwent second-order phase transitions. The maximum magnetic entropy changes (׀ΔSM׀) under a field change from 0 to 5 T were measured as 10.66, 9.02, 5.41 and 4.64 J/kg·K for x = 0.0, 0.04, 0.08 and 0.12, respectively. Corresponding, the relative cooling power values were calculated to be 172.43, 161.44, 152.76 and 138.09 J/kg. These findings suggest that Pr(Co1-xMnx)2 compounds are promising candidates for magnetic refrigeration applications at intermediate temperatures.