Journal
NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-30074-4
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Funding
- National Key Basic Research Program of China [2019YFA0308500]
- National Nature Science Foundation of China [92163102, 52172269, 11774172, 52102177, 51725104, 11721404, 1217021241]
- National Natural Science Foundation of Jiangsu Province [BK20210313]
- Jiangsu Specially-Appointed Professor Program
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- Natural Science Fund Project of Hunan Province, China [2020JJ5453]
- Scientific Research Fund of Hunan Provincial Education Department, China [20B487]
- Beijing Natural Science Foundation [Z190011]
- Technological Innovation Project of Beijing Institute of technology
- Natural Science Foundation of Shanghai [21ZR1402400]
- U.S. National Science Foundation [DMR-2016453, DMR-1565822]
- European Union [823717-ESTEEM3]
- EPSRC [EP/L011700/1, EP/N004272/1]
- Royal Academy of Engineering [CiET1819_24]
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In this study, the authors demonstrate an emergent multiferroism with magnetodielectric coupling in EuTiO3 created by a negative pressure control of strong spin-phonon coupling.
Negative pressure has emerged as a powerful tool to tailor the physical properties of functional materials. However, a negative pressure control of spin-phonon coupling for engineering magnetism and multiferroicity has not been explored to date. Here, using uniform three-dimensional strain-induced negative pressure in nanocomposite films of (EuTiO3)(0.5):(MgO)(0.5), we demonstrate an emergent multiferroicity with magnetodielectric coupling in EuTiO3, matching exactly with density functional theory calculations. Density functional theory calculations are further used to explore the underlying physics of antiferromagnetic-paraelectric to ferromagnetic-ferroelectric phase transitions, the spin-phonon coupling, and its correlation with negative pressures. The observation of magnetodielectric coupling in the EuTiO3 reveals that an enhanced spin-phonon coupling originates from a negative pressure induced by uniform three-dimensional strain. Our work provides a route to creating multiferroicity and magnetoelectric coupling in single-phase oxides using a negative pressure approach. Negative pressure tailors the physical properties of functional oxide materials. Here, the authors demonstrate an emergent multiferroism with magnetodielectric coupling in EuTiO3 created by a negative pressure control of strong spin-phonon coupling.
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