TITLE

Fabrication of acoustic superlattice LiNbO[sub 3] by pulsed current induction and its application for crossed field ultrasonic excitation

AUTHOR(S)
Wan, Zhi-liang; Zhi-liang Wan; Wang, Quan; Quan Wang; Xi, Yuan-xin; Yuan-xin; Lu, Yan-qing; Yan-qing Lu; Zhu, Yong-yuan; Yong-yuan Zhu; Ming, Nai-ben; Nai-ben Ming
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/18/2000, Vol. 77 Issue 12
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An acoustic superlattice LiNbO[sub 3] crystal with periodic ferroelectric domain structure was fabricated by introducing a periodic electric current through the solid-liquid interface during the crystal growing process. The domain morphology of an as-grown crystal was observed with a scanning electron microscope, and was found to be of good periodicity. A light diffraction experiment indicated that there was a periodic fluctuation of the dielectric constant along the crystal's growing direction. Using the "crossed field" scheme, a 340 MHz ultrasonic was excited in the crystal, which means that the acoustic superlattice is suitable for constructing high-frequency bulk-wave acoustic devices. © 2000 American Institute of Physics.
ACCESSION #
4414262

 

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