EXAFS Study of Defect Structure in PbWO4 Single Crystals

FENG Xi-Qi; ZHU Wen-Liang; WU Zong-Hua; XIE Ya-Ning

Chinese Physics C> 2003, Vol. 27> Issue(S1) : 1-4

EXAFS Study of Defect Structure in PbWO4 Single Crystals

The State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China2 Beijing Synchrotron Laboratory,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039,China

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Abstract：
The greatly stucture-sensitive characteristic of lead tungstate crystals (PWO) results in a complex defect phenomena inside.This research aims to clarify the mechanism of the annealing process and the doping mechanism of heterovalent ion doping in PWO from a viewpoint of microstructure-analysis.A variety of experiments were performed,including optical absorption spectrospcopy,impedance spectroscopy,X-ray photonelectron spectroscopy and EXAFS anaysis.Among them,EXAFS plays an important role for the availability to provide such structural informations as surrounding species,coordination number,and atomic distance.We report here the results of the defect-investigation in PWO crystals,conducted on the EXAFS experimental station of BSRL in 2002.

References

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HAN Rao-Guo, FENG Xi-Qi et al. J. Appl. Phys. , 1999, 86:3571-35752 Kobayashi M, Usuki Y et al. Nucl. Tnstrum. Meth. Phys. Res.,1997, A399 : 261-2663 HAN Rao-Guo, FENG Xi-Qi et al. J. Appl. Phys. , 1998, 84:2831-28344 LIN Qi-Sheng, FENG Xi-Qi et al. Phys. Rev. B, 2001 , 63: 13415,1-65 Senguttuvan N, lshii M et al. Jpn. J. Appl. Phys. , 2000, 39:5134-51386 SHI Chao-Shu, WET Ya-Guang et al. Chem. Phys. Lett. , 2000,328: 1-47 LIN Qi-Sheng, FENG Xi-Qi. J. Phys. : Condens. Matt. , 2003,15:1963-19738 LI Wen-Sheng, TANG Tong-Rao et al. Jpn. J. Appl. Phys. , 2001 ,40 : 6893-68959 ZHU Wen-Liang, FENG Xi-Qi et al. Phys. Stat. Sol. ( a ) , 2002,193: 211-21610 JAVED M et al. J. Am. Ceram. Sac. , 1975,78: 421-42811 Donnerberg H, Tomlinson S M et al. Phys. Rev. B, 1992,44:4877-4883

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FENG Xi-Qi, ZHU Wen-Liang, WU Zong-Hua and XIE Ya-Ning. EXAFS Study of Defect Structure in PbWO4 Single Crystals[J]. Chinese Physics C, 2003, 27(S1): 1-4.

FENG Xi-Qi, ZHU Wen-Liang, WU Zong-Hua and XIE Ya-Ning. EXAFS Study of Defect Structure in PbWO4 Single Crystals[J]. Chinese Physics C, 2003, 27(S1): 1-4. shu

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Received: 2003-11-21
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

EXAFS Study of Defect Structure in PbWO4 Single Crystals

Corresponding author: FENG Xi-Qi,

The State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China2 Beijing Synchrotron Laboratory,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039,China

Received Date: 2003-11-21
Accepted Date: 1900-01-01
Available Online: 2003-01-02

Abstract: The greatly stucture-sensitive characteristic of lead tungstate crystals (PWO) results in a complex defect phenomena inside.This research aims to clarify the mechanism of the annealing process and the doping mechanism of heterovalent ion doping in PWO from a viewpoint of microstructure-analysis.A variety of experiments were performed,including optical absorption spectrospcopy,impedance spectroscopy,X-ray photonelectron spectroscopy and EXAFS anaysis.Among them,EXAFS plays an important role for the availability to provide such structural informations as surrounding species,coordination number,and atomic distance.We report here the results of the defect-investigation in PWO crystals,conducted on the EXAFS experimental station of BSRL in 2002.