Leakage Current Characteristics of Lead-Free K0.5Na0.5NbO3 Ferroelectric Thin Films with (K,Na) Excess and Li Substitution

被引：10

作者：

Kim, Jin Soo ^{[1
,2
]}

Lee, Sun Young ^{[1
,2
]}

Ahn, Chang Won ^{[3
]}

Hwang, Hak In ^{[3
]}

Lee, Hai Joon ^{[1
,2
]}

Bae, Se Hwan ^{[4
]}

Kim, Ill Won ^{[1
,2
]}

机构：

[1] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[2] Univ Ulsan, Energy Harvest Storage Res Ctr, Ulsan 680749, South Korea

[3] KETI, Convergence Components R&D Div, Songnam 463816, South Korea

[4] Dong A Univ, Dept Phys, Pusan 604714, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

ELECTRICAL-PROPERTIES; PIEZOELECTRIC PROPERTIES; TEMPERATURE; BEHAVIOR;

D O I：

10.1143/JJAP.49.095805

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

K0.5Na0.5NbO3 thin films with (K,Na) excess and LiNbO3 substitution were fabricated on a Pt substrate by a chemical solution deposition method. The K0.5Na0.5NbO3 thin films with (K,Na) 10 mol% excess and LiNbO3 5 mol% substitution showed a saturated ferroelectric polarization-electric field (P-E) hysteresis loop and the estimated remanent polarization (P-r) and coercive field (E-c) were 8.6 mu C/cm(2) and 40 kV/cm at 280 kV/cm, respectively. Compared to pure K0.5Na0.5NbO3 thin films, the ferroelectric polarization of the thin film was improved and leakage current densities were decreased. Moreover, the ferroelectric polarization and leakage current characteristics are stable for higher applied electric fields and elevated temperatures. The conduction behaviours of these films were analyzed by Schottky and Poole-Frenkel emission. (C) 2010 The Japan Society of Applied Physics

引用

页数：6

共 28 条

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