DocumentCode
1605519
Title
Theoretical study of quantum effect on ferroelectric transition in 18O-isotope exchanged SrTiO3
Author
Tchouobiap, S. E Mkam ; Mashiyama, H.
Author_Institution
Department of Physics, Graduate School of Science and Engineering, Yamaguchi University, 1677-1 Yoshida, 753-8512, Japan
Volume
2
fYear
2008
Firstpage
1
Lastpage
2
Abstract
A theoretical picture for soft mode behavior and the phase transition in STO18-x is investigated throughout the concentration range x from 0 to 1. The approach was realized through extending the quasi-harmonic approximation to a quantum particle within a local potential of the double-Morse type, and combining the predominant mass effect with the cell volume effect and ferroelectric distortion. It is found that the quantum effects govern the low temperature regime and, the displacive-type phase transition is recognized with perfect softening at Tc for x ?? xc =0.318.
Keywords
Electronic components; Ferroelectric materials; Frequency; Land surface temperature; Microscopy; Physics; Quantum mechanics; Softening; Strontium; Titanium compounds;
fLanguage
English
Publisher
ieee
Conference_Titel
Applications of Ferroelectrics, 2008. ISAF 2008. 17th IEEE International Symposium on the
Conference_Location
Santa Re, NM, USA
ISSN
1099-4734
Print_ISBN
978-1-4244-2744-4
Electronic_ISBN
1099-4734
Type
conf
DOI
10.1109/ISAF.2008.4693772
Filename
4693772
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