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Hetero-epitaxial growth and large piezoelectric effects in (001) and (111) oriented PbTiO3-LaNiO3 multilayers

Title
Hetero-epitaxial growth and large piezoelectric effects in (001) and (111) oriented PbTiO3-LaNiO3 multilayers
Authors
Jin, H. J.Oh, S. H.Jo, W.
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2016
Journal Title
JOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN
0022-3727JCR Link1361-6463JCR Link
Citation
vol. 49, no. 12
Keywords
ferroelectricsthin filmshetero-epitaxy
Publisher
IOP PUBLISHING LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Hetero-epitaxial thin films were obtained in PbTiO3/LaNiO3 thin films by using laser ablation for sequential deposition of each thin film. Structural variations were built to characterize the differences in local ferroelectric properties. For this study, 50 nm-thick-PTO thin films with (0 0 1) and (1 1 1) orientations were investigated. Piezoresponse force microscopy (PFM) was used to investigate the local ferroelectricity in the thin films. High piezoelectric responses were obtained in the thin films, with values of approximately 75 and 83 pm V-1 in the (0 0 1) and (1 1 1)-oriented thin films, respectively. It is notable that remarkable piezoelectric properties were obtained in the (1 1 1)-oriented thin films. The (1 1 1)-oriented thin films have the potential to be used as multi-bit memory because of the reduction of degradation in ferroelectricity and various directional piezoelectricity. We compared the functionalities of the (0 0 1)- and (1 1 1)-oriented thin films and obtained different performances in the thin films.
DOI
10.1088/0022-3727/49/12/125305
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자연과학대학 > 물리학전공 > Journal papers
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