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<p>Multiferroic materials, characterized by their novel multi-field coupling, exhibit promising applications in modern optoelectronic devices. However, the mutual regulation of polarization and magnetization, a crucial capability for next-generation multifunctional devices, remains a persistent challenge despite decades of research efforts. In this work, we fabricated (Bi<sub>2</sub>FeCrO<sub>6</sub>/Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>)<sub><i>n</i></sub> (<i>n</i> = 1, 2, 3) heterojunction thin films employing the pulsed laser deposition process to investigate magnetoelectric coupling performance and its underlying regulation mechanism. The results indicate that interface density, interface de-pinning, and stress/strain transfer efficiency significantly affect the magnetoelectric response, resulting in enhanced multiferroic properties in (BFCO/NZF)<sub>3</sub>, where <i>P</i><sub>r</sub> = 19.2&#xa0;μC&#xa0;cm<sup>−2</sup>, <i>M</i><sub>s</sub> = 32.2&#xa0;emu&#xa0;cm<sup>−3</sup>, <i>α</i><sub><i>E</i></sub> = 26.0&#xa0;mV&#xa0;cm<sup>−1</sup> Oe<sup>−1</sup>. Furthermore, investigations of magnetoelectric mutual regulation reveal that dipole dynamic changes driven by the <i>Lorentz</i> and electrostatic forces in the superposition field of electrostatic and steady magnetic fields are the main reasons for domain structure evolution, thus providing a reference for in-depth research on the multi-physical field regulation mechanism in multiferroics.</p>

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Magnetoelectric regulation in multiferroic double perovskite heterojunction thin films

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • Kaixin Guo,
  • Qing Li,
  • Bowang Liu,
  • Rongfen Zhang,
  • Xu Wang,
  • Chaoyong Deng

摘要

Multiferroic materials, characterized by their novel multi-field coupling, exhibit promising applications in modern optoelectronic devices. However, the mutual regulation of polarization and magnetization, a crucial capability for next-generation multifunctional devices, remains a persistent challenge despite decades of research efforts. In this work, we fabricated (Bi2FeCrO6/Ni0.5Zn0.5Fe2O4)n (n = 1, 2, 3) heterojunction thin films employing the pulsed laser deposition process to investigate magnetoelectric coupling performance and its underlying regulation mechanism. The results indicate that interface density, interface de-pinning, and stress/strain transfer efficiency significantly affect the magnetoelectric response, resulting in enhanced multiferroic properties in (BFCO/NZF)3, where Pr = 19.2 μC cm−2, Ms = 32.2 emu cm−3, αE = 26.0 mV cm−1 Oe−1. Furthermore, investigations of magnetoelectric mutual regulation reveal that dipole dynamic changes driven by the Lorentz and electrostatic forces in the superposition field of electrostatic and steady magnetic fields are the main reasons for domain structure evolution, thus providing a reference for in-depth research on the multi-physical field regulation mechanism in multiferroics.