Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3696071
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Funding
- Natural Science Foundation of Anhui Province [1108085J14]
- National Natural Science Foundation of China [50972035, 50920105101]
- Program for New Century Excellent Talents in University
- State Education Ministry [NCET-08-0766]
- 973 Program [2009CB623301]
- Ministry of Education of China, Zhejiang University
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High resolution synchrotron x-ray and dielectric measurements on unpoled and poled (Na,K)(Nb,Sb)O-3-LiTaO3-xBaZrO(3) lead-free ceramics close to the rhombohedral-tetragonal (R-T) phase boundary have suggested an additional lattice distortion induced by poling field. This intermediate phase (IP) is consistent with the orthorhombic (O) symmetry but lower symmetries cannot be discarded. As a result, a modified polarization rotation path along R-IP-T in poled ceramics would be responsible for their high piezoelectric activity owing to the effect of the IP bridging the R and T phases. Simultaneously, the electric field induced phase transition would probably contribute to the observed large piezoelectric strains. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3696071]
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