Zhao Hanzhang, Yang Chao, Liu Yadong, Wang Qiaoqiao, Wu Yongyi, Mu Qiuxuan, Hou Feiyan, Min Tai, Li Tao
Centre for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Solid State Microstructure National Key Lab and Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
Adv Mater. 2025 Aug;37(32):e2500534. doi: 10.1002/adma.202500534. Epub 2025 May 28.
Multiferroic heterostructures offer a promising platform for next-generation low-power spintronic devices by enabling electric-field control of magnetism. While recent advances in two-dimensional (2D) van der Waals (vdW) magnetic and ferroelectric materials have sparked significant interest, achieving reliable and nonvolatile electrical modulation of magnetism at room temperature within vdW multiferroic heterostructures remains a substantial challenge. Here, this study demonstrates robust, reproducible, and nonvolatile electrical control of ferromagnetism in FeGaTe/CuInPS multiferroic heterostructures under ambient conditions. The modulation is evidenced macroscopically by reshaped magnetic hysteresis loops in anomalous Hall voltage measurements and microscopically by in situ magnetic and electric field-induced domain evolution captured via magnetic force microscopy. The first-principles calculations reveal that the polarization of CuInPS induces a significant modulation of the Dzyaloshinskii-Moriya interaction (DMI) in FeGaTe. Incorporating these effects into micromagnetic simulations reproduces key features of the experimental hysteresis behaviors, indicating that the polarization-enhanced DMI lowers domain wall formation energy and drives a transition from coherent to incoherent magnetic reversal. These findings not only surmount the challenge of electrically modulating ferromagnetism in vdW systems via remanent ferroelectric polarization at room temperature but also open new pathways for energy-efficient skyrmion manipulation and vdW spintronic device engineering.
多铁性异质结构通过实现磁场的电场控制，为下一代低功耗自旋电子器件提供了一个有前景的平台。尽管二维（2D）范德华（vdW）磁性和铁电材料的最新进展引发了极大兴趣，但在vdW多铁性异质结构中在室温下实现可靠且非易失性的磁性电调制仍然是一项重大挑战。在此，本研究展示了在环境条件下FeGaTe/CuInPS多铁性异质结构中铁磁性的稳健、可重复且非易失性的电控制。这种调制在宏观上通过反常霍尔电压测量中重塑的磁滞回线得到证明，在微观上通过磁力显微镜捕获的原位磁场和电场诱导的畴演化得到证明。第一性原理计算表明，CuInPS的极化在FeGaTe中诱导了Dzyaloshinskii-Moriya相互作用（DMI）的显著调制。将这些效应纳入微磁模拟再现了实验磁滞行为的关键特征，表明极化增强的DMI降低了畴壁形成能，并驱动了从相干到非相干磁反转的转变。这些发现不仅克服了在室温下通过剩余铁电极化对vdW系统中的铁磁性进行电调制的挑战，还为节能斯格明子操纵和vdW自旋电子器件工程开辟了新途径。
