Fabrication of lead-free ferroelectric (Na,K)NbO3 thin films by pulsed laser deposition

Author

Nakao, Tomoki ; Koyama, N. ; Fujii, Ichiro ; Wada, Tomotaka

Author_Institution

Dept. of Mater. Chem., Ryukoku Univ., Otsu, Japan

fYear

2013

fDate

21-25 July 2013

Firstpage

93

Lastpage

95

Abstract

We fabricated (Na_1-xK_x)NbO₃ (NKN) thin films with x=0.1 (NKN10), 0.2 (NKN20) and 0.3 (NKN30) on SrTiO₃ (STO) substrate by pulsed laser deposition (PLD). NKN ceramics were prepared by modified solid-state reaction method, and NKN thin films were fabricated using this ceramics target by PLD. The NKN films were epitaxially grown on (001), (110) and (111) STO substrates. The NKN films on (001) STO had a smooth surface, the films on (110) STO had a striped pattern, and the films on (111) STO had trigonal pyramid-like structure. It was observed that remanent polarizations of the films increased with increasing K content. The P-E hysteresis of NKN30 film on (111) STO substrate showed a very large hysteresis loop with a remanent polarization P_r of 69 μC/cm².

Keywords

dielectric hysteresis; dielectric polarisation; epitaxial growth; ferroelectric ceramics; ferroelectric thin films; potassium compounds; pulsed laser deposition; sodium compounds; (001) SrTiO₃ substrate; (110) SrTiO₃ substrate; (111) SrTiO₃ substrate; (Na_1-xK_x)NbO₃; NKN ceramics; P-E hysteresis loop; PLD; SrTiO₃; epitaxial growth; lead-free ferroelectric thin films; pulsed laser deposition; remanent polarizations; solid-state reaction method; trigonal pyramid-like structure; Epitaxial growth; Piezoelectric polarization; Substrates; X-ray scattering; (Na, K)NbO3; PLD; ferroelectric; lead-free; thin film;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectric and Workshop on the Piezoresponse Force Microscopy (ISAF/PFM), 2013 IEEE International Symposium on the

Conference_Location

Prague

Type

conf

DOI

10.1109/ISAF.2013.6748684

Filename

6748684