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Dhanvir Singh Rana, Iwao Kawayama, Krushna Mavani, Kouhei Takahashi, Hironaru Murakami and Masayoshi Tonouchi Understanding the Nature of Ultrafast Polarization Dynamics of Ferroelectric Memory in the Multiferroic BiFeO3 Advanced Materials 21

Version of Record online: 14 APR 2009 | DOI: 10.1002/adma.200802094

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The crystallographic anisotropy in electromagnetic terahertz radiation from multiferroic BiFeO3 (100), (110), and (111) films suggests the ultrafast depolarization of ferroelectric order as a new mechanism of terahertz emission. This implies that the spontaneous polarization in ferroelectric materials can be manipulated in time scale of picoseconds, thus paving the way to ultrafast data-storage devices based on nonvolatile ferroelectric memories.

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