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Scaling effect of flexoelectric (Ba,Sr)TiO 3 microcantilevers
Author(s) -
Huang Wenbin,
Kim Kyungrim,
Zhang Shujun,
Yuan FuhGwo,
Jiang Xiaoning
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201105326
Subject(s) - flexoelectricity , piezoelectricity , cantilever , materials science , piezoelectric coefficient , scaling , piezoresponse force microscopy , nanoscopic scale , polarization (electrochemistry) , condensed matter physics , nano , transverse plane , nanotechnology , optoelectronics , composite material , ferroelectricity , chemistry , dielectric , physics , geometry , mathematics , structural engineering , engineering
The flexoelectric microcantilever offers an alternative approach for the development of micro/nano‐sensors. The transverse flexoelectric coefficients µ 12 of barium strontium titanate microcantilevers were measured at room temperature, and found to keep the same value of 8.5 µC/m for microcantilevers with thickness ranging from 30 µm to 1.4 mm. The calculated effective piezoelectric coefficient and electrical energy density of flexoelectric cantilevers are superior to those of their piezoelectric counterparts, suggesting that the flexoelectricity‐induced polarization can be significantly increased as structures are scaled down due to the scaling effect of strain gradient, holding promise for flexoelectric micro/nano cantilever sensing applications. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)