Multiferroic co-enhancement mechanism in double perovskite thin films through inequivalent chemical modulation

Single-phase multiferroics, which are driven by magnetic structures, are considered as an ideal material platform for realizing next-generation multi-field coupled spintronic devices. However, their Curie temperatures remain far below room temperature and/or the ferroelectric polarization is nearly vanishing. Here, an inequivalent charge strategy is reported that simultaneously enhances the ferroelectric and ferromagnetic ordering in Bi2FeMnO6 double perovskite thin films, effectively exploiting the tunability of chemical strain and valence. Abnormal lattice distortion and differential charge compensation ensure robust ferroelectricity (16.6–29.2 μC/cm2) and approximately sevenfold enhancement from 8.3 to 60 emu/cm3 in ferromagnetism, with Curie temperatures of both ferroic orderings exceeding 800 K, which is the best high-temperature metrics for existing multiferroic systems. Since ferroelectricity originates from Bi ions and octahedral distortions, this effectively avoids small polarization and weak A–B site coupling. This mechanism is expected to reignite interest in type I multiferroics and prompt a reexamination of current schemes for overcoming the incompatibility of the multiple ferroic orderings. Our work provides an important technological path and experimental insight for the development of room-temperature multiferroics by leveraging the tunability of double perovskites.

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Publication Details

Journal
Applied Physics Reviews
Published
2025-07-25
DOI
https://doi.org/10.1063/5.0267270
Citations
2
Primary Topic
Multiferroics and related materials
Type
article
Field-Weighted Citation Impact
0.85

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article

Multiferroic co-enhancement mechanism in double perovskite thin films through inequivalent chemical modulation

Linxing Zhang, Hangren Li, Xudong Liu, Jiesu Wang et al.
2 citations
Applied Physics Reviews
Multiferroics and related materials
0.85
article

Multiferroic co-enhancement mechanism in double perovskite thin films through inequivalent chemical modulation

Linxing Zhang, Hangren Li, Xudong Liu, Jiesu Wang, X. G. Liu, Jianjun Tian, Jie Tu, Junwei Zhang, Xuefeng Wang, Jiushe He, Fangyuan Zhu, Rong Wu, Kai Chang, Guoqiang Xi, Shiyao Wu
article en
2 citations

Abstract

Single-phase multiferroics, which are driven by magnetic structures, are considered as an ideal material platform for realizing next-generation multi-field coupled spintronic devices. However, their Curie temperatures remain far below room temperature and/or the ferroelectric polarization is nearly vanishing. Here, an inequivalent charge strategy is reported that simultaneously enhances the ferroelectric and ferromagnetic ordering in Bi2FeMnO6 double perovskite thin films, effectively exploiting the tunability of chemical strain and valence. Abnormal lattice distortion and differential charge compensation ensure robust ferroelectricity (16.6–29.2 μC/cm2) and approximately sevenfold enhancement from 8.3 to 60 emu/cm3 in ferromagnetism, with Curie temperatures of both ferroic orderings exceeding 800 K, which is the best high-temperature metrics for existing multiferroic systems. Since ferroelectricity originates from Bi ions and octahedral distortions, this effectively avoids small polarization and weak A–B site coupling. This mechanism is expected to reignite interest in type I multiferroics and prompt a reexamination of current schemes for overcoming the incompatibility of the multiple ferroic orderings. Our work provides an important technological path and experimental insight for the development of room-temperature multiferroics by leveraging the tunability of double perovskites.

Applied Physics ReviewsVol. 12(3)
Chinese Academy of Sciences (CN), Lanzhou University of Technology (CN), Beijing University of Technology (CN), Shanghai Advanced Research Institute (CN), Shanghai Institute of Applied Physics (CN), Collaborative Innovation Center of Advanced Microstructures (CN), Beijing Academy of Quantum Information Sciences (CN), Lanzhou University (CN), Nanjing University (CN), University of Science and Technology Beijing (CN)
National Natural Science Foundation of China, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
Openalex Percentile: Top 26%
Multiferroics and related materials
0.85
DOISourceOpenAlex
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