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Integrated Ferroelectrics
An International Journal
Volume 141, 2013 - Issue 1
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Original Articles

Structural and Electrical Properties of Mn-doped Na0.5Bi0.5TiO3 Lead-Free Single Crystal

Y. Chen Department of Applied Physics, The Hong Kong Polytechnic University, Shenzhen Research Institute, Hunghom, Hong Kong, China
,
K. H. Lam Department of Applied Physics, The Hong Kong Polytechnic University, Shenzhen Research Institute, Hunghom, Hong Kong, China
,
D. Zhou Department of Applied Physics, The Hong Kong Polytechnic University, Shenzhen Research Institute, Hunghom, Hong Kong, China
,
J. Y. Dai Department of Applied Physics, The Hong Kong Polytechnic University, Shenzhen Research Institute, Hunghom, Hong Kong, China
,
H. S. Luo R & D Center of Crystal, Shanghai Institute of Ceramics, Chinese Academy of Science, Jiading, Shanghai, 201800, China
,
X. P. Jiang Department of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, 333001, China
&
H. L. W. Chan Department of Applied Physics, The Hong Kong Polytechnic University, Shenzhen Research Institute, Hunghom, Hong Kong, China
 show all
Pages 120-127 | Received 30 Jun 2012, Accepted 20 Oct 2012, Published online: 09 May 2013
 
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Abstract

The electrical properties and Raman spectroscopy of [001]-oriented pure lead-free Na0.5Bi0.5TiO3 (NBT) and manganese-doped NBT single crystals have been investigated. With the effect of Mn-doping, the remnant polarization P r has a great enhancement from 15.2 μC/cm2 to 30.0 μC/cm2, and the pyroelectric coefficient is improved significantly from 178 μC/m2K to 241 μC/m2K. The Mn-doping has further altered the domain structure of the crystals, as revealed by piezoresponse force microscopy study. The Raman studies suggest that the substitution effect of Mn ions on B-site cations of the perovskite structure results in enhancement of the performance of the Mn-doped NBT single crystals.

Acknowledgments

This research was supported by the National key Basic Research Program of China (973 Program) under Grant No. 2013CB632900. This work was supported by the internal grants of the Hong Kong Polytechnic University (No.1-BBZ3, 1-BB95), National Natural Science Foundation of China (Grant No: 50862005, 50562002).

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