Interfacial strain driven magnetoelectric coupling in (111)-oriented self-assembled BiFeO3–CoFe2O4 thin films
| Autor: | Dawei Zhang, Lei Wang, Zhongshuai Liang, Jihong Bian, Guanghao Lu, Linglong Li, Lu Lu, Bian Yang, Yaodong Yang |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Spintronics 02 engineering and technology General Chemistry Substrate (electronics) 021001 nanoscience & nanotechnology 01 natural sciences Piezoelectricity Magnetic field Strain engineering Ferromagnetism 0103 physical sciences Materials Chemistry Multiferroics Thin film 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry C. 8:3527-3535 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc06739f |
| Popis: | Magnetoelectric materials have been considered as promising candidates for data storage and sensors based on spintronic technology. Multiferroic BiFeO3–CoFe2O4 (BFO–CFO) epitaxial thin films deposited on a (111)-oriented SrTiO3 substrate exhibit ferromagnetism, piezoelectricity and strong magnetoelectric properties simultaneously. Interfacial strain between two phases plays a key role in such unique characters. Thus, strain engineering is a good method to enhance the magnetoelectric coupling effect. Here, to clearly understand the role of strain for further strain engineering, the interfacial strain between BFO and CFO and its evolution under electric/magnetic fields are investigated. This work semiquantitatively establishes a detailed relationship between the magnetoelectric coupling effect and interfacial strains – the piezoelectric amplitude drops by 44.7% and meanwhile the out-of-plane tensile strain rises by 11.0% under magnetic fields. This finding is helpful in optimizing multiferroic composite structures and achieving wider applications in future. |
| Databáze: | OpenAIRE |
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