A new physical effect is reported. In single crystals of lithium niobate (LiNbO3), we have observed an acoustical memory effect. An acoustical tone burst is stored inside the crystal and reemitted at a later time. This memory signal is related to the acousto-electrical properties of the ferroelectric medium. Futhermore, it is shown to be sensitive to both temperature and frequency.
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| http://dx.doi.org/10.1103/PhysRevLett.89.115506 | DOI Listing |
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