cherry at phy.olemiss.edu
Fri Jan 17 08:40:32 CST 2003
January 21, 2003
University of Mississippi
Refreshments at 3:45
Seminar at 4:00
A new discovery of energy storage in single crystals of lithium
niobate, called "Acoustical Memory," recently has been reported
[PRL, v.89, pp. 115506-1/3 (2002)]. An understanding of acoustical
memory sheds light on some unusual behavior seen in this material.
For example, ultrasonic attenuation measurements in Lithium Niobate
below 100MHz are known to be difficult; this difficulty can be
explained by including the effect of acoustical memory on the system.
In this talk, the general features of acoustical memory are
discussed. Furthermore, new acoustical attenuation measurements
utilizing the understanding of acoustical memory are described.
Additionally, the possible influence of acoustical memory on
measurements of the ultrasonic nonlinearity is discussed.
Michael Shannon McPherson
Email: 1awake at bellsouth.net
NCPA 1903 Anderson Road
Coliseum Drive Apt A-2
University, MS 38677 Oxford, MS 38655
Phone: (662) 915-7551 (662) 234-5463
Department of Physics and Astronomy
Lewis Hall, Room 108
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