Nanoscale polarization relaxation and piezoelectric properties of SBN thin films / Melo M., Araujo E.B., Ivanov M., Shur V.Y., Kholkin A.L. // 2016 Joint IEEE International Symposium on the Applications of Ferroelectrics, European Conference on Application of Polar Dielectrics, and Piezoelectric Force Microscopy Workshop, ISAF/ECAPD/PFM 2016. - 2016. - V. , l. .

ISSN:
нет данных
Type:
Conference Paper
Abstract:
Randomly oriented Sr0.75Ba0.25Nb2O6 thin films have been deposited on Pt(111)/Ti/SiO2/Si substrates using a polymeric chemical route to study their peculiar nanopolar structures and local ferroelectric properties using piezoresponse force microscopy (PFM) technique. PFM images reveals grains with contrast among fully white and fully black, a clear indication of non-zero polarization in the SBN films far above Tm ∼ 221 K. Asymmetries observed in local hysteresis loops recorded at different grains suggest an imprint effect in the studied films due to an internal build-in electric field. Some grains show asymmetric hysteresis loops while other grains show symmetric hysteresis loops. The origin of the imprint effect observed in the SBN films is discussed in terms of complex defects associated to oxygen vacancies. The experimental relaxation curves were fitted using the Kohlrausch-Williams-Watts function. The time constant τ increases from 404 to 977 ms as the magnitude voltage increases. © 2016 IEEE.
Author keywords:
piezoresponse; polarization relaxation; SBN films
Index keywords:
Barium; Dielectric materials; Electric fields; Electric force microscopy; Ferroelectric films; Ferroelectric materials; Hysteresis; Hysteresis loops; Niobium; Oxygen vacancies; Piezoelectricity; Polar
DOI:
10.1109/ISAF.2016.7578084
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https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994180663&doi=10.1109%2fISAF.2016.7578084&partnerID=40&md5=8e0aa01b9e391b4388d88ea567bd9a03
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Art. No. 7578084
Link https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994180663&doi=10.1109%2fISAF.2016.7578084&partnerID=40&md5=8e0aa01b9e391b4388d88ea567bd9a03
Affiliations Department of Physics and Chemistry, São Paulo State University (UNESP), Ilha Solteira, Brazil; Department of Physics and CICECO, University of Aveiro, Aveiro, Portugal; Institute of Natural Sciences, Ural Federal University, Ekaterinburg, Russian Federation
Author Keywords piezoresponse; polarization relaxation; SBN films
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Correspondence Address Melo, M.; Department of Physics and Chemistry, São Paulo State University (UNESP)Brazil
Publisher Institute of Electrical and Electronics Engineers Inc.
Conference name 2016 Joint IEEE International Symposium on the Applications of Ferroelectrics, European Conference on Application of Polar Dielectrics, and Piezoelectric Force Microscopy Workshop, ISAF/ECAPD/PFM 2016
Conference date 21 August 2016 through 25 August 2016
Conference code 124082
ISBN 9781509018710
Language of Original Document English
Abbreviated Source Title Jt. IEEE Int. Symp. Appl. Ferroelectr., Eur. Conf. Appl. Polar Dielectr., Piezoelectric Force Microsc. Workshop, ISAF/ECAPD/PFM
Source Scopus