Robust Ferrimagnetism and Ferroelectricity in 2D ɛ‐Fe₂O₃ Semiconductor with Ultrahigh Ordering Temperature

Tao Wang; Wuhong Xue; Huali Yang; Yongzhao Zhang; Shaobo Cheng; Zhiwei Fan; Run‐Wei Li; Peng Zhou; Xiaohong Xu

doi:10.1002/adma.202311041

journal article·2024-08

Robust Ferrimagnetism and Ferroelectricity in 2D ɛ‐Fe₂O₃ Semiconductor with Ultrahigh Ordering Temperature

Tao Wang, Wuhong Xue, Huali Yang, Yongzhao Zhang, Shaobo Cheng, Zhiwei Fan, Run‐Wei Li, Peng Zhou, Xiaohong Xu

Advanced Materials· Volume 36· Issue 35

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Source abstract

Abstract

Abstract 2D single‐phase multiferroic materials with the coexistence of electric and spin polarization offer a tantalizing potential for high‐density multilevel data storage. One of the current limitations for application is the scarcity of the materials, especially those combine ferromagnetism and ferroelectricity at high temperatures. Here, robust ferrimagnetism and ferroelectricity in 2D ɛ‐Fe₂O₃ samples with both single‐crystalline and polycrystalline form are demonstrated. Interestingly, the polycrystalline nanosheets also exhibit easily switchable ferroelectric polarizations comparable to that of single crystals. The existence of grain boundary does not hinder the switching and retention of ferroelectric polarization. Furthermore, the ɛ‐Fe₂O₃ nanosheets show ferrimagnetic and ferroelectric Curie temperatures up to 800 K, which reaches record highs in 2D single‐phase multiferroic materials. This work provides important progress in the exploration of 2D high‐temperature single‐phase multiferroics for potentially compact high‐temperature information nanodevices.

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Research context

Nanomaterials Electronic materials

OpenAlex topics: Multiferroics and related materials · Ferroelectric and Piezoelectric Materials · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials Science Shanxi Normal University Taiyuan 030031 China

CAS Key Laboratory of Magnetic Materials and Devices & Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China

Institute of Quantum Materials and Physics Henan Academy of Science Zhengzhou 450046 China

Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material Physics School of Physics and Microelectronics Zhengzhou University Zhengzhou 450000 China

ASIC & System State Key Lab School of Microelectronics Fudan University Shanghai 200433 China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China

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