Multiferroicity in two dimensional Co2Cl2 monolayer
Abstract Multiferroicity has been studied for about 70 years and resurging recently due to rapid experimental and theoretical advances. However, two-dimensional ferromagnetic-ferroelastic multiferroicity, which is crucial to magneto-elastic nanodevices, is still very rare. Here, we propose that the...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Communications Materials |
| Online Access: | https://doi.org/10.1038/s43246-025-00855-7 |
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| Summary: | Abstract Multiferroicity has been studied for about 70 years and resurging recently due to rapid experimental and theoretical advances. However, two-dimensional ferromagnetic-ferroelastic multiferroicity, which is crucial to magneto-elastic nanodevices, is still very rare. Here, we propose that the Co2Cl2 monolayer exhibits ferromagnetic-ferroelastic multiferroicity. The system has two asymmetric phases: FE-I, a metallic ferromagnetic phase, and FE-II, a semiconducting antiferromagnetic phase, which can be switched by strain. We show that Co2Cl2 monolayers undergo both metal-insulator and ferromagnetism-antiferromagnetism transitions due to the different crystal fields surrounding Co2+ ions. Interestingly, both the ferromagnetic and antiferromagnetic phases exhibit high critical temperatures, making this material promising for device applications. |
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| ISSN: | 2662-4443 |