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<p>Phase-pure Y<sub>1−<i>x</i></sub>Er<sub><i>x</i></sub>FeO<sub>3</sub> with <i>x</i> from 0.2 to 1.0 was prepared by a low-temperature hydrothermal route in NaOH at 240&#xa0;°C for 48&#xa0;h, yielding orthorhombic perovskite structures with a systematic transition from Pnma to Pbnm space group symmetry upon Er<sup>3+</sup> substitution. Structural characterization revealed progressive lattice contraction following Vegard’s law, accompanied by morphological evolution from quadrilateral to truncated rhombic hexagonal prisms. Multiferroic property measurements demonstrate complex composition-dependent behavior: while ferroelectric remanent polarization decreases from 1.95&#xa0;μC/cm<sup>2</sup> in pristine YFeO<sub>3</sub>, magnetic saturation increases threefold to 4.13&#xa0;emu/g in ErFeO<sub>3</sub> through Er<sup>3+</sup>–Fe<sup>3+</sup> magnetic coupling, albeit with reduced coercivity due to weakened magnetic anisotropy. These findings establish fundamental structure–property relationships in rare-earth-substituted orthoferrites, providing design principles for tailoring multiferroic properties in next-generation spintronic and memory applications.</p>

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Effect of Er substitution on the structure of YFeO3

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Yuxiang Liu,
  • Xiangping Wang,
  • Guojian Jiang,
  • Dandan Wu,
  • Weidan Ma

摘要

Phase-pure Y1−xErxFeO3 with x from 0.2 to 1.0 was prepared by a low-temperature hydrothermal route in NaOH at 240 °C for 48 h, yielding orthorhombic perovskite structures with a systematic transition from Pnma to Pbnm space group symmetry upon Er3+ substitution. Structural characterization revealed progressive lattice contraction following Vegard’s law, accompanied by morphological evolution from quadrilateral to truncated rhombic hexagonal prisms. Multiferroic property measurements demonstrate complex composition-dependent behavior: while ferroelectric remanent polarization decreases from 1.95 μC/cm2 in pristine YFeO3, magnetic saturation increases threefold to 4.13 emu/g in ErFeO3 through Er3+–Fe3+ magnetic coupling, albeit with reduced coercivity due to weakened magnetic anisotropy. These findings establish fundamental structure–property relationships in rare-earth-substituted orthoferrites, providing design principles for tailoring multiferroic properties in next-generation spintronic and memory applications.