This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1063/1.3499273 in citations.
Please use the identifier: http://hdl.handle.net/2128/18107 in citations.
Ferroelectricity in nonstoichiometric SrTiO3 films studied by ultraviolet Raman spectroscopy
Ferroelectricity in nonstoichiometric SrTiO3 films studied by ultraviolet Raman spectroscopy
Homoepitaxial Sr1+xTiO3+delta films with -0.2 <= x <= 0.25 grown by reactive molecular-beam epitaxy on SrTiO3 (001) substrates have been studied by ultraviolet Raman spectroscopy. Nonstoichiometry for strontium-deficient compositions leads to the appearance of strong first-order Raman scatteri...
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Personal Name(s): | Tenne, D.A. |
---|---|
Farrar, A.K. / Brooks, C.M. / Heeg, T. / Schubert, J. / Jang, H.W. / Bark, C.W. / Folkman, C.M. / Eom, C.B. / Schlom, D.G. | |
Contributing Institute: |
Halbleiter-Nanoelektronik; IBN-1 JARA-FIT; JARA-FIT |
Published in: | Applied physics letters, 97 (2010) S. 142901 |
Imprint: |
Melville, NY
American Institute of Physics
2010
|
Physical Description: |
142901 |
DOI: |
10.1063/1.3499273 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Applied Physics Letters
97 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/18107 in citations.
Homoepitaxial Sr1+xTiO3+delta films with -0.2 <= x <= 0.25 grown by reactive molecular-beam epitaxy on SrTiO3 (001) substrates have been studied by ultraviolet Raman spectroscopy. Nonstoichiometry for strontium-deficient compositions leads to the appearance of strong first-order Raman scattering at low temperatures, which decreases with increasing temperature and disappears at about 350 K. This indicates the appearance of a spontaneous polarization with a paraelectric-to-ferroelectric transition temperature above room temperature. Strontium-rich samples also show a strong first-order Raman signal, but the peaks are significantly broader and exhibit a less pronounced temperature dependence, indicating a stronger contribution of the disorder-activated mechanism in Raman scattering. (C) 2010 American Institute of Physics. [doi:10.1063/1.3499273] |