[Seminar] None

[Cherry Douglas]

Seminar
January 21, 2003
Michael McPherson
University of Mississippi
Lewis Hall
Room 101
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
(Work)                                     (Home)
Address:
NCPA                                      1903 Anderson Road
Coliseum Drive                         Apt A-2
University, MS 38677                Oxford, MS 38655

Phone: (662) 915-7551             (662) 234-5463

-- 
Cherry Douglas
Operations Coordinator
Department of Physics and Astronomy
Lewis Hall, Room 108
662-915-5631 Phone
662-915-5045 Fax