Microstructure and electrical properties of Mn-doped barium strontium titanate thin films prepared on copper foils

被引:48
作者
Fan, Yanhua [1 ,2 ]
Yu, Shuhui [1 ]
Sun, Rong [1 ]
Li, Lei [1 ]
Yin, Yansheng [2 ]
Wong, Ka-Wai [3 ]
Du, Ruxu [1 ]
机构
[1] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518067, Peoples R China
[2] Shanghai Maritime Univ, Inst Marine Mat Sci & Engn, Shanghai 200135, Peoples R China
[3] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
Thin films; Sol-gel growth; Microstructure; Electrical properties; SOL-GEL METHOD; DIELECTRIC-PROPERTIES; BA1-XSRXTIO3; CERAMICS;
D O I
10.1016/j.apsusc.2010.04.042
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ba(0.7-x)Sr(0.3)Mn(x)TiO(3) (x = 0, 0.025, 0.05) thin films have been prepared on copper foils using sol-gel method. The films were processed in an atmosphere with low oxygen pressure so that the substrate oxidation is avoided and the formation of the perovskite phase is allowed. XRD and SEM results showed that Mn doping enhanced the crystallization of the perovskite phase in the films. TheMnsubstitution prevents the reduction of Ti(4+) to Ti(3+), which is supported by XPS analysis. The Ba(0.7-x)Sr(0.3)Mn(x)TiO(3) film with x = 0.025 (BSMT25) exhibits preferred dielectric behavior and a lower leakage current density among the three thin films. The dielectric constant and loss of the BSMT25 film are 1213.5 and 0.065 at 1MHz and around zero field, which are mostly desired for embedded capacitor applications. The mechanism of Mn doping on improving the electrical properties of barium strontium titanate (BST) thin films was investigated. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:6531 / 6535
页数:5
相关论文
共 22 条
[1]   Significant suppression of leakage current in (Ba,Sr)TiO3 thin films by Ni or Mn doping [J].
Ahn, KH ;
Baik, S ;
Kim, SS .
JOURNAL OF APPLIED PHYSICS, 2002, 92 (05) :2651-2654
[2]  
[Anonymous], 1995, Handbook of X-ray Photoelectron Spectroscopy. A Reference Book of Standard Spectra for Identification and Interpretation of XPS Data
[3]   Structural and thermal analyses on phase evolution of sol-gel (Ba,Sr)TiO3 thin films [J].
Chen, XF ;
Lu, WQ ;
Zhu, WG ;
Lim, SY ;
Akbar, SA .
SURFACE & COATINGS TECHNOLOGY, 2003, 167 (2-3) :203-206
[4]   Structure-property relationships in pure and acceptor-doped Ba1-xSrxTiO3 thin films for tunable microwave device applications [J].
Cole, MW ;
Hubbard, C ;
Ngo, E ;
Ervin, M ;
Wood, M ;
Geyer, RG .
JOURNAL OF APPLIED PHYSICS, 2002, 92 (01) :475-483
[5]   Effect of donor and acceptor dopants on Schottky barrier heights and vacancy concentrations in barium strontium titanate [J].
Dawber, M ;
Scott, JF ;
Hartmann, AJ .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2001, 21 (10-11) :1633-1636
[6]   Synthesis and properties of barium strontium titanate thin films on copper foils [J].
Fan, Yanhua ;
Yu, Shuhui ;
Sun, Rong ;
Li, Lei ;
Du, Ruxu ;
Yin, Yansheng ;
Yao, Yingbang .
MULTI-FUNCTIONAL MATERIALS AND STRUCTURES, PTS 1 AND 2, 2008, 47-50 :562-+
[7]  
FAN YH, 2008, ICEPT HDP, pE2
[8]  
Ihlefeld J.F., 2006, Synthesis and Properties of Barium Titanate Solid Solution Thin Films deposited on Copper Substrates
[9]  
IHLEFELD JF, 2006, MAT RES SOC S P E, V902
[10]   Improvement in electrical characteristics of graded manganese doped barium strontium titanate thin films [J].
Jain, M ;
Majumder, SB ;
Katiyar, RS ;
Miranda, FA ;
Van Keuls, FW .
APPLIED PHYSICS LETTERS, 2003, 82 (12) :1911-1913