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<p>Multicomponent perovskite oxides enable simultaneous tailoring of multiple properties due to their highly tunable chemistries. In this paper, a novel high-entropy perovskite compound (Eu<sub>0.2</sub>Gd<sub>0.2</sub>Tb<sub>0.2</sub>Dy<sub>0.2</sub>Ho<sub>0.2</sub>)CrO<sub>3</sub> is synthesized by the solid-state reaction method. The X-ray diffraction, scanning electron microscopy images and energy dispersive spectroscopy analysis in combination with the tolerance factor calculation demonstrate that the sample forms a single orthorhombic perovskite with a space group of Pbnm. Second-order antiferromagnetic-paramagnetic phase transition occured at around 4.2 K, confirmed by means of Arrott plot and normalization curve. The maximal magnetic entropy change shifted to the high temperature region with increasing the magnetic field, and reached 11.9 J/(kg·K) in the vicinity of 4 K at a magnetic field of 5 T. The maximum of temperature-averaged entropy change was 10.80 J/(kg·K), indicating that this type of material could be a potential candidate for low temperature magnetic refrigeration (&lt; 20 K).</p>

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Magnetic and magnetocaloric effects of high-entropy perovskite oxide (Eu0.2Gd0.2Tb0.2Dy0.2Ho0.2)CrO3 at low temperatures

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Guoming Lv,
  • Yuwei Li,
  • Fangyuan Zhang,
  • Hang Shentu,
  • Xiukun Hu,
  • Qiong Wu,
  • Minxiang Pan,
  • Nengjun Yu,
  • Jieyang Fang,
  • Hangfu Yang,
  • Hongliang Ge

摘要

Multicomponent perovskite oxides enable simultaneous tailoring of multiple properties due to their highly tunable chemistries. In this paper, a novel high-entropy perovskite compound (Eu0.2Gd0.2Tb0.2Dy0.2Ho0.2)CrO3 is synthesized by the solid-state reaction method. The X-ray diffraction, scanning electron microscopy images and energy dispersive spectroscopy analysis in combination with the tolerance factor calculation demonstrate that the sample forms a single orthorhombic perovskite with a space group of Pbnm. Second-order antiferromagnetic-paramagnetic phase transition occured at around 4.2 K, confirmed by means of Arrott plot and normalization curve. The maximal magnetic entropy change shifted to the high temperature region with increasing the magnetic field, and reached 11.9 J/(kg·K) in the vicinity of 4 K at a magnetic field of 5 T. The maximum of temperature-averaged entropy change was 10.80 J/(kg·K), indicating that this type of material could be a potential candidate for low temperature magnetic refrigeration (< 20 K).