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<p>Two-dimensional materials that combine ferroelectric and ferromagnetic orders could exhibit a range of exotic physical properties and find use in applications such as energy-efficient spintronics. However, long-range ferroic orders in two dimensions are prone to destruction. For example, depolarization fields can destabilize ferroelectric order and thermal fluctuations can suppress magnetic order. Here we report multiferroic van der Waals heterostructures made from atomic layers of ferroelectric CuCrP<sub>2</sub>S<sub>6</sub> and ferromagnetic Fe<sub>3</sub>GeTe<sub>2</sub>. We demonstrate reversible, non-volatile ferroelectric control of the magnetic anisotropy of two-dimensional Fe<sub>3</sub>GeTe<sub>2</sub>, and with this, probe the interferroic magnetoelectric coupling. Polarization switching of CuCrP<sub>2</sub>S<sub>6</sub> changes the magnetic coercivity of a 3.8-nm-thick Fe<sub>3</sub>GeTe<sub>2</sub> layer by approximately 14 mT at a testing temperature of 153 K, with a control efficiency around 65%. The control efficiency decreases as the Fe<sub>3</sub>GeTe<sub>2</sub> thickness increases due to the short-range interfacial magnetoelectric coupling of the heterostructure multiferroicity.</p>

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Interferroic magnetoelectric coupling at CuCrP2S6/Fe3GeTe2 van der Waals heterojunctions

  • 期刊论文

  • 发表日期：

    2026年1月21日

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  • Shanchuan Liang,
  • Yinchang Ma,
  • Baojuan Xin,
  • Saif Siddique,
  • Carter Fox,
  • Olha Popova,
  • Sabine M. Neumayer,
  • Petro Maksymovych,
  • Matthew L. Chin,
  • Yixiao Wang,
  • Hongrui Zhang,
  • Hasitha Suriya Arachchige,
  • Michael A. Susner,
  • Benjamin S. Conner,
  • David Mandrus,
  • Thomas E. Murphy,
  • Jun Xiao,
  • Judy J. Cha,
  • Wei-Hua Wang,
  • Xixiang Zhang,
  • Ramamoorthy Ramesh,
  • Cheng Gong

摘要

Two-dimensional materials that combine ferroelectric and ferromagnetic orders could exhibit a range of exotic physical properties and find use in applications such as energy-efficient spintronics. However, long-range ferroic orders in two dimensions are prone to destruction. For example, depolarization fields can destabilize ferroelectric order and thermal fluctuations can suppress magnetic order. Here we report multiferroic van der Waals heterostructures made from atomic layers of ferroelectric CuCrP2S6 and ferromagnetic Fe3GeTe2. We demonstrate reversible, non-volatile ferroelectric control of the magnetic anisotropy of two-dimensional Fe3GeTe2, and with this, probe the interferroic magnetoelectric coupling. Polarization switching of CuCrP2S6 changes the magnetic coercivity of a 3.8-nm-thick Fe3GeTe2 layer by approximately 14 mT at a testing temperature of 153 K, with a control efficiency around 65%. The control efficiency decreases as the Fe3GeTe2 thickness increases due to the short-range interfacial magnetoelectric coupling of the heterostructure multiferroicity.