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<p>The cryogenic magnetocaloric (MC) properties in many Gd-based magnetic oxides have been intensively determined recently, with the aim of developing high-performing materials for magnetic refrigeration (MR) applications. Herein, we synthesized the Gd<sub>7</sub>BP<sub>2</sub>O<sub>17</sub> via a solid-state reaction route and experimentally investigated its structure, elemental valence states, magnetism, and cryogenic MC responses. The Gd<sub>7</sub>BP<sub>2</sub>O<sub>17</sub> oxide crystallizes in the monoclinic structure (space group: <i>P</i><sub>21</sub>/<i>c</i>, no. 14) and its constituent elements are with the forms of Gd<sup>3+</sup>, B<sup>3+</sup>, P<sup>5+</sup>, and O<sup>2−</sup>. A remarkable reversible MC effect was realized in Gd<sub>7</sub>BP<sub>2</sub>O<sub>17</sub> oxide around 3.3 K with a maximum magnetic entropy change, refrigerant capacity, and relative cooling power of 37.35 J/kg·K, 328.07 J/kg, and 430.89 J/kg under 0–7 T magnetic field variation, respectively. These deduced MC parameters are at a similarly high level with most recently realized high-performing Gd-based magnetic oxides, making the present Gd<sub>7</sub>BP<sub>2</sub>O<sub>17</sub> oxide considerable for practical application.</p>

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Magnetic Properties and Cryogenic Magnetocaloric Performance of Gd7BP2O17 Oxide

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Wang Chen,
  • Zhenqian Zhang,
  • Junli Lin,
  • Zhe Kong,
  • Lingwei Li

摘要

The cryogenic magnetocaloric (MC) properties in many Gd-based magnetic oxides have been intensively determined recently, with the aim of developing high-performing materials for magnetic refrigeration (MR) applications. Herein, we synthesized the Gd7BP2O17 via a solid-state reaction route and experimentally investigated its structure, elemental valence states, magnetism, and cryogenic MC responses. The Gd7BP2O17 oxide crystallizes in the monoclinic structure (space group: P21/c, no. 14) and its constituent elements are with the forms of Gd3+, B3+, P5+, and O2−. A remarkable reversible MC effect was realized in Gd7BP2O17 oxide around 3.3 K with a maximum magnetic entropy change, refrigerant capacity, and relative cooling power of 37.35 J/kg·K, 328.07 J/kg, and 430.89 J/kg under 0–7 T magnetic field variation, respectively. These deduced MC parameters are at a similarly high level with most recently realized high-performing Gd-based magnetic oxides, making the present Gd7BP2O17 oxide considerable for practical application.