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- W4242943864 abstract "Research at Mack's Laboratory at the National Center for Physical Acoustics (NCPA) has discovered that a LiNbO3 single crystal can memorize an ultrasonic pulse for tens of microseconds, the frequency range was 17 to 28 MHz. Supposedly, the Acoustical Memory (AM) effect is connected to the oxide internal microstructures. This conclusion is based on frequency, thermal and ultrasound attenuation data. Mack Breazeale leadership, scholarly character, and gentle nature were clearly revealed through these experimental investigations, various meetings, and scientific discussions in his office and laboratory. However, a basic connection between the ceramic microstructures and AM formation was not revealed until recent experiments. Further development of AM investigations is done in the inversely poled ferroelectric wafers of LiNbO3 and LiTaO3. The speeds of different acoustic modes are altered in the presence of periodically poled ferroelectric domains. Calculations for a bulk periodically poled LiNbO3 yield a similar result despite the uniform acoustic properties along a crystal. The specific internal microstructures in a non-homogenous ferroelectric along with the associated distortions in acoustical dispersion curves may be physical grounds of the acoustical memory effect. Some applications are discussed." @default.
- W4242943864 created "2022-05-12" @default.
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- W4242943864 date "2010-01-01" @default.
- W4242943864 modified "2023-10-18" @default.
- W4242943864 title "Research on acoustical memory discovered in the laboratory of Mack Breazeale" @default.
- W4242943864 doi "https://doi.org/10.1121/1.4718868" @default.
- W4242943864 hasPublicationYear "2010" @default.
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