Premium
Electric and Magnetic Properties of Bilayered Lead‐Free Piezoelectric and Multiferroic Bi 0.9 Dy 0.1 FeO 3 / K 0.5 Na 0.5 NbO 3 Thin Films
Author(s) -
Chen Ling,
Ren Wei,
Ye ZuoGuang,
Tian Aifen,
Wu Xiaoqing,
Shi Peng,
Chen Xiaofeng
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05279.x
Subject(s) - materials science , crystallinity , ferroelectricity , multiferroics , pulsed laser deposition , thin film , piezoelectricity , piezoelectric coefficient , analytical chemistry (journal) , composite material , nuclear magnetic resonance , nanotechnology , optoelectronics , dielectric , chemistry , physics , chromatography
Composite lead‐free piezoelectric and multiferroic thin films consisting of Bi 0.9 Dy 0.1 FeO 3 ( BDF ) and K 0.5 Na 0.5 NbO 3 ( KNN ) nanolayers were prepared on the Pt / TiO 2 / SiO 2 / Si substrates by pulsed laser deposition. The bilayered BDF / KNN films exhibited a preferential (100)‐orientation and much enhanced ferroelectric properties (2 P r = 26.5 μC/cm 2 , 2 E c = 369.2 kV/cm) as compared to those of single layer BDF or KNN thin film. In addition, the bilayered BDF / KNN films also showed ferromagnetic behavior at low temperature (2 M r = 1.57 emu/cm 3 , 2 H c = 3 kOe). The enhanced ferroelectric properties of the bilayered BDF / KNN thin films were attributed to the significantly reduced leakage current arising from the enhanced crystallinity and the interface reaction of the BDF and KNN nanolayers. An effective piezoelectric coefficient d 33 of 12 pm/V was measured on the bilayered films.