TITLE

Large tunability driven by low electric field in oxygen-isotope-exchanged strontium titanate at cryogenic temperatures

AUTHOR(S)
Wang, Ruiping; Itoh, Mitsuru
PUB. DATE
April 2002
SOURCE
Applied Physics Letters;4/22/2002, Vol. 80 Issue 16, p2964
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The substitution of heavy isotope [sup 18]O for [sup 16]O in SrTiO[sub 3] simultaneously results in a significant enhancement of tunability and a large reduction of driving electric fields at cryogenic temperatures. For a 36% oxygen isotope exchanged SrTiO[sub 3] at 2 K, the driving electric field for the tunability of 0.82 is about half an order lower than that for an unexchanged one. The tunability and the figure of merit could be tailored by the oxygen isotope exchange rate. It is considered that the phenomena are closely related to the appearance of ferroelectric microregions and the “domain state” in this system [R. Wang and M. Itoh, Phys. Rev. B 62, R731 (2000)]. © 2002 American Institute of Physics.
ACCESSION #
6494758

 

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