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Hyperfine Interactions

, Volume 40, Issue 1–4, pp 367–370 | Cite as

Mössbauer study of the perovskite series Sr(Fe1−xTix)Oy

  • Yufang Zheng
  • Zhengfang Yu
  • Yan Zhuang
  • Yanzheng Lin
  • Dongyan Zhu
Chemical Structure and Bonding

Abstract

57Fe Mőssbauer effect in the perovskite series Sr(Fe1−xTix)Oy (0.0≤x≤0.99; y≤3) at RT and 78K has been analyzed. The influences of the Ti composition on the coexitence of Fe4+ and Fe3+, the ratio of Fe4+ to the total Fe, and the Y value have been studied. When 0≤x≤0.6 the ratio of Fe3+ (II) doublet to the total Fe increases as the final firing temperature increases, agreeing with the result obtained from the positron lifetime measurements. When x≥0.7, the Fe3+ (II) doublet disappears. In the range of x=0.9 and x=0.99, there still exists a considerable content of Fe4+ in samples, disagreeing with the result obtained from the chemical analysis by Clevenger. The relations between the electrical resistivity and the thermistor material constant B of negative temperature characteristic varying with Ti composition have been discussed.

Keywords

Thin Film Chemical Analysis Temperature Increase Perovskite Electrical Resistivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. /1/.
    T.R. Clevenger, Jr., J. Am. Ceram. Soc. 46 (1963) 207.Google Scholar
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    P.K. Gallagher, J.B. MacChesney and D.N.E. Buchanan, J. Chem. Phy. 11 (1964) 2429.Google Scholar
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    E. Fluch, W. Kerler and W. Neuwirth, Augew. Chem. Intern. Ed. Engl. 2 (1963) 277.Google Scholar
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    J.S. Waugh, Technical Report No. 152, Laboratory for Insulation Research, Massachusetts Institute of Technology, August 1960.Google Scholar

Copyright information

© J.C. Baltzer AG, Scientific Publishing Company 1988

Authors and Affiliations

  • Yufang Zheng
    • 1
  • Zhengfang Yu
    • 1
  • Yan Zhuang
    • 2
  • Yanzheng Lin
    • 2
  • Dongyan Zhu
    • 2
  1. 1.Department of PhysicsZhongshan UniversityGuangzhouChina
  2. 2.Guangzhou Institute of CommunicationsChina

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