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<p>We investigate the magnetic properties of the system Fe<sub>2</sub>(SO<sub>4</sub>)(TeO<sub>3</sub>)<sub>2</sub>·3H<sub>2</sub>O by susceptibility and high-field electron spin resonance (ESR) and dielectric measurements. The research reveals a dual magnetic ordering regime: short-range antiferromagnetic (AFM) correlations emerge at 53.6&#xa0;K, followed by long-range AFM order at 32.0&#xa0;K. A spin-flop transition is induced at 7&#xa0;T (2&#xa0;K) when the magnetic field aligns with the magnetically easy <i>c</i>-axis, accompanied by spin canting along the <i>b</i>-axis and antiparallel alignment of Fe<sup>3</sup>⁺ spins along the <i>c</i>-axis and chains. Weak ferromagnetism probably results from a significant Dzyaloshinskii–Moriya interaction. Notably, the compound shows a magnetically tunable dielectric behavior.</p>

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Emergent Magnetodielectric Coupling and Spin-Flop Transitions in a Low-Dimensional Iron(III) System

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • Yujie Song,
  • Zhengcai Xia,
  • Guiling Xiao,
  • Lixia Xiao

摘要

We investigate the magnetic properties of the system Fe2(SO4)(TeO3)2·3H2O by susceptibility and high-field electron spin resonance (ESR) and dielectric measurements. The research reveals a dual magnetic ordering regime: short-range antiferromagnetic (AFM) correlations emerge at 53.6 K, followed by long-range AFM order at 32.0 K. A spin-flop transition is induced at 7 T (2 K) when the magnetic field aligns with the magnetically easy c-axis, accompanied by spin canting along the b-axis and antiparallel alignment of Fe3⁺ spins along the c-axis and chains. Weak ferromagnetism probably results from a significant Dzyaloshinskii–Moriya interaction. Notably, the compound shows a magnetically tunable dielectric behavior.