TITLE

Dielectric and piezoelectric properties of lead-free (Bi,Na)TiO3-based thin films

AUTHOR(S)
Abazari, M.; Safari, A.; Bharadwaja, S. S. N.; Trolier-McKinstry, S.
PUB. DATE
February 2010
SOURCE
Applied Physics Letters;Feb2010, Vol. 96 Issue 8, p082903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Dielectric and piezoelectric properties of morphotropic phase boundary (Bi,Na)TiO3–(Bi,K)TiO3–BaTiO3 epitaxial thin films deposited on SrRuO3 coated SrTiO3 substrates were reported. Thin films of 350 nm thickness exhibited small signal dielectric permittivity and loss tangent values of 750 and 0.15, respectively, at 1 kHz. Ferroelectric hysteresis measurements indicated a remanent polarization value of 30 μC/cm2 with a coercive field of 85–100 kV/cm. The thin film transverse piezoelectric coefficient (e31,f) of these films after poling at 600 kV/cm was found to be -2.2 C/m2. The results indicate that these BNT-based thin films are a potential candidate for lead-free piezoelectric devices.
ACCESSION #
48352151

 

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