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Title
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Mechanical switching of nanoscale multiferroic phase boundaries
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Author
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Abstract
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| Tuning the lattice degree of freedom in nanoscale functional crystals is critical to exploit the emerging functionalities such as piezoelectricity, shape-memory effect, or piezomagnetism, which are attributed to the intrinsic lattice-polar or lattice-spin coupling. Here it is reported that a mechanical probe can be a dynamic tool to switch the ferroic orders at the nanoscale multiferroic phase boundaries in BiFeO3 with a phase mixture, where the material can be reversibly transformed between the soft tetragonal-like and the hard rhombohedral-like structures. The microscopic origin of the nonvolatile mechanical switching of the multiferroic phase boundaries, coupled with a reversible 180 degrees rotation of the in-plane ferroelectric polarization, is the nanoscale pressure-induced elastic deformation and reconstruction of the spontaneous strain gradient across the multiferroic phase boundaries. The reversible control of the room-temperature multiple ferroic orders using a pure mechanical stimulus may bring us a new pathway to achieve the potential energy conversion and sensing applications. |
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Language
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English
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Source (journal)
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Advanced functional materials. - Weinheim
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Publication
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Weinheim
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2015
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ISSN
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1616-301X
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DOI
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10.1002/ADFM.201500600
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Volume/pages
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25
:22
(2015)
, p. 3405-3413
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ISI
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000355992600017
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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