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Identification of Local Phase of Nanoscale BaTiO3 Powders by High-Resolution Electron Energy Loss Spectroscopy

Published online by Cambridge University Press:  06 August 2013

Sun-Min Moon ,
Xiaohui Wang  and
Nam-Hee Cho
Sun-Min Moon
Affiliation:
Department of Materials Science and Engineering, Inha University, Incheon 402-751, Republic of Korea
Xiaohui Wang
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Baijing 100084, China
Nam-Hee Cho*
Affiliation:
Department of Materials Science and Engineering, Inha University, Incheon 402-751, Republic of Korea
*
*Corresponding author. E-mail: [email protected]
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Abstract

The electron energy loss spectroscopy (EELS) technique was applied to investigate the local variation in the phase of barium titanate (BaTiO3) ceramics. It was found that the fine structure of the titanium L2,3 edge and their satellite peaks were sensitively varied with the tetragonal–cubic phase transition. The peak splitting of Ti-L3 edge of tetragonal-phased BaTiO3 ceramics was widened because of the increased crystal field effect compared with that of cubic-phased BaTiO3. In case of nanoscale BaTiO3 powders, the L3 edge splitting of the core region was found to be smaller than that of the shell region. The energy gap between peaks t2g and eg varied from 2.36 to 1.94 eV with changing the probe position from 1 to 20 nm from the surface. These results suggest that the EELS technique can be used to identify the local phase of sintered BaTiO3 ceramics.

Keywords

BaTiO3phaseEELSnanopowdertetragonalcubic
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 123 - 126
Copyright
Copyright © Microscopy Society of America 2013 

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References

Bagayoko, D., Zhao, G.L., Fan, J.D. & Wang, J.T. (1998). Ab initio calculations of the electronic structure and optical properties of ferroelectric tetragonal BaTiO3. J Phys: Condens Matter 10, 5645–5655.Google Scholar
Cao, G. & Brinker, C.J. (2008). Annual Review of Nano Research. Singapore, London: World Scientific Publishing Co.Google Scholar
Cohen, R. & Hrakauer, H. (1990). Lattice dynamics and origin of ferroelectricity in barium titanate (BaTiO3): Linearized-augmented-plane-wave total-energy calculations. Phys Rev B42, 6416–6423.Google Scholar
Cohen, R. & Hrakauer, H. (1992). Electronic structure studies of the differences in ferroelectric behavior of barium titanate and lead titanate (PbTiO3). Ferroelectrics 136, 65–83.Google Scholar
Egerton, R.F. (1986). Electron Energy-Loss Spectroscopy in the Electron Microscope. New York, London: Plenum Press.Google Scholar
Leapman, R.D. & Grunes, L.A. (1980). Anomalous L3/L2 white-line ratios in the 3d transition metals. Phys Rev Lett 45, 397–401.Google Scholar
Moon, S.-M. & Cho, N.-H. (2007). Size effects on the crystal structure of nanoscale BaTiO3 powders prepared by hydro-thermal synthesis. Met Mat Int 13, 329–333.Google Scholar
Moon, S.-M. & Cho, N.-H. (2009). Investigation of phase distribution in nanoscale BaTiO3 powders prepared by hydro-thermal synthesis. J Electroceram 23, 121–126.Google Scholar
Smolenskii, G.A., Bokov, V.A., Isupov, V.A., Krainik, N.N., Pasynkov, R.E. & Sokolov, A.I. (1984). Ferroelectrics and Related Materials. New York, London, Paris, Montreux, Tokyo: Gordon and Breach Science Publishers.Google Scholar
Thole, B.T. & Laan, G. (1988). Branching ratio in X-ray absorption spectroscopy. Phys Rev B38, 3158–3171.Google Scholar
Wada, S., Hoshina, T., Takizawa, K., Ohishi, M., Yasuno, H., Kakemoto, H. & Tsurumi, T. (2007). Origin of ultrahigh dielectric constants for barium titanate nanoparticles. J Kor Phys Soc 51, 878–881.Google Scholar
Yu, R. & Krakauer, H. (1994). Linear-response calculations within the linearized augmented plane-wave method. Phys Rev B49, 4467–4477.Google Scholar
Zhang, Z., Visinoiu, A., Heyroth, F., Syrowatka, F., Alexe, M., Hesse, D. & Leipner, H.S. (2005). High-resolution electron energy-loss spectroscopy of BaTiO3/SrTiO3 multilayers. Phys Rev B71, 064108-1–064108-7.Google Scholar