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<p>Superconductivity has been realized in rare-earth nickelates, yet only at extreme conditions: either as strained thin films or under high pressure. Owing to the narrow lattice-tolerance window, compositional tuning is severely restricted by conventional synthesis. To circumvent this bottleneck, we have prepared a series of multiple rare-earth <i>Ln</i><sub>4</sub>Ni<sub>3</sub>O<sub>10</sub> (<i>Ln</i> = La, Pr, Nd, Sm, and Eu) samples through an entropy stabilization strategy. The increased configurational entropy expands the lattice tolerability of the samples and enhances the tunab<Emphasis Type="Underline">i</Emphasis>lity of their physical properties. Heat capacity, resistivity and magnetization measurements reveal pronounced changes in electric and magnetic behaviours across the series. The electric response appears may due to the effect of configurational entropy rising. X-ray diffraction and X-ray photoemission spectroscopy indicate that the magnetization variations may stem from spin state change of Ni ions, which triggered by a progressive distortion of Ni-O octahedra.</p>

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Spin state of nickel ions and electrical behaviour in entropy-stabilized rare-earth nickelate Ln4Ni3O10

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月8日

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  • Shangxiong Huangfu,
  • Lele Wang,
  • Xingzhe Sun,
  • Huanlong Liu,
  • Xiaofu Zhang,
  • Yi Wang,
  • Ming Liu,
  • Andreas Schilling,
  • Lin Ma,
  • Hongli Suo

摘要

Superconductivity has been realized in rare-earth nickelates, yet only at extreme conditions: either as strained thin films or under high pressure. Owing to the narrow lattice-tolerance window, compositional tuning is severely restricted by conventional synthesis. To circumvent this bottleneck, we have prepared a series of multiple rare-earth Ln4Ni3O10 (Ln = La, Pr, Nd, Sm, and Eu) samples through an entropy stabilization strategy. The increased configurational entropy expands the lattice tolerability of the samples and enhances the tunability of their physical properties. Heat capacity, resistivity and magnetization measurements reveal pronounced changes in electric and magnetic behaviours across the series. The electric response appears may due to the effect of configurational entropy rising. X-ray diffraction and X-ray photoemission spectroscopy indicate that the magnetization variations may stem from spin state change of Ni ions, which triggered by a progressive distortion of Ni-O octahedra.