Chin. Phys. Lett.  2009, Vol. 26 Issue (4): 047702    DOI: 10.1088/0256-307X/26/4/047702
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Ferroelectric Properties of Bi3.25La0.75Ti3O12 Thin Films Crystallized inDifferent N2/O2 Ambients
LI Jian-Jun, YU Jun, LI Jia, YANG Wei-Ming, ZHOU Bin, GAO Jun-Xiong, WANG Yun-Bo
Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074
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LI Jian-Jun, YU Jun, LI Jia et al  2009 Chin. Phys. Lett. 26 047702
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Abstract Bi3.25La0.75Ti3O12 (BLT) ferroelectric thin films are deposited by sol-gel method and annealed for crystallizaion in total 1sccm N2/O2 mixed gas with various ratio at 750°C for 30min. The effect of crystallization ambient on the structural and ferroelectric properties of the BLT films is studied. The growth direction and grain size of BLT film are revealed to affect ferroelectric properties. After the BLT film is annealed in 20% O2, the largest Pr value is obtained, which is ascribed to an increase of random orientation and large grain size. The fatigue property is improved with the concentration of oxygen in the ambient increasing, which is ascribed to annealing in the ambient with high concentrated oxygen adequately decreasing the defects related to lack of oxygen.
Keywords: 77.80.-e      77.84.-s     
Received: 06 October 2008      Published: 25 March 2009
PACS:  77.80.-e (Ferroelectricity and antiferroelectricity)  
  77.84.-s (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/4/047702       OR      https://cpl.iphy.ac.cn/Y2009/V26/I4/047702
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LI Jian-Jun
YU Jun
LI Jia
YANG Wei-Ming
ZHOU Bin
GAO Jun-Xiong
WANG Yun-Bo
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