Enhanced ferroelectric properties of LiNbO3 substituted Na0.5K0.5NbO3 lead-free thin films grown by chemical solution deposition

被引：56
|
作者：
Ahn, Chang Won [1 ]
Jeong, Euh Duck [1 ]
Lee, Sun Young [2 ]
Lee, Hai Joon [2 ]
Kang, Sun Hee [2 ]
Kim, Ill Won [2 ]
机构：
[1] Korea Basic Sci Inst, High Technol Components & Mat Res Ctr, Pusan 618230, South Korea
[2] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 21期
关键词：
dielectric hysteresis; dielectric thin films; ferroelectric ceramics; ferroelectric Curie temperature; leakage currents; liquid phase deposition; lithium compounds; piezoceramics; potassium compounds; sodium compounds;
D O I：
10.1063/1.3037214
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have fabricated environmental friendly lead-free ferroelectric Na0.5K0.5NbO3 (NKN) and 0.95Na(0.5)K(0.5)NbO(3)-0.05LiNbO(3) (0.95NKN-0.05LN) thin films by chemical solution deposition using metal-organic compounds, and studied the effects of LN substitution through the dielectric and ferroelectric properties. The small amount of LN substitution for NKN thin film led to a marked improvement in leakage current properties at the high electric field region. Furthermore, the 0.95NKN-0.05LN thin film (350 nm) displayed clear ferroelectricity with well saturated P-E hysteresis loop with 2P(r) and 2E(c) values of 19.5 mu C/cm(2) and 91 kV/cm, respectively. The 0.95NKN-0.05LN films will be interesting for applications in lead-free ferroelectric and piezoelectric devices.
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页数：3
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