Journal of Materials Science

, Volume 20, Issue 7, pp 2459–2463 | Cite as

Magnetoresistance measurements in the bulk amorphous GexSe1−x system

  • R. M. Mehra
  • Hemant Kumar
  • S. C. Agarwal
  • Surinder Koul
  • P. C. Mathur
Papers

Abstract

Magnetoresistance (MR) measurements were made on bulk amorphous Ge x Se1−x samples in the temperature range 80 to 300 K and magnetic field up to 8 kG (0.8 T). It is found that MR is negative at all temperatures. At a given temperature, the magnitude of the negative MR and the exponentn of magnetic field variation are found to increase with an increase in the proportion of selenium. These results have been analysed in terms of various existing models of MR.

Keywords

Polymer Magnetic Field Selenium Field Variation Magnetic Field Variation 

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References

  1. 1.
    W. Sasaki andDe B. Ouboter,Physica 27 (1961) 977.Google Scholar
  2. 2.
    R. P. Khosla andJ. R. Fischer,Phys. Rev. B2 (1970) 4084.Google Scholar
  3. 3.
    Idem, ibid. B6 (1972) 4073.Google Scholar
  4. 4.
    M. R. Boon,ibid. 87 (1973) 761.Google Scholar
  5. 5.
    H. Roth, W. P. Streub, W. Wernard andJ. E. Muthem,Phys. Rev. Lett. 11 (1963) 328.Google Scholar
  6. 6.
    G. Bauer andH. Kahlert,Phys. Rev. B5 (1972) 566.Google Scholar
  7. 7.
    J. F. Woods andG. Y. Chen,ibid. 135 (1964) A1462.Google Scholar
  8. 8.
    W. Sasaki,J. Phys. Soc. Jpn. 20 (1965) 825.Google Scholar
  9. 9.
    C. Yamanouchi, K. Mizuguchi andW. Sasaki,ibid. 22 (1967) 859.Google Scholar
  10. 10.
    Y. Katayama andS. Tanaka,Phys. Rev. 153 (1967) 873.Google Scholar
  11. 11.
    H. Mell andJ. Stuke,Phys. Status Solidi 24 (1967) 183.Google Scholar
  12. 12.
    Idem, J. Non-Cryst. Solids 4 (1970) 304.Google Scholar
  13. 13.
    H. Mell, “Proceedings of the 5th International Conference on Amorphous and Liquid Semiconductors”, Garmisch, Partenischen, FRG, 1973, edited by J. Stuke and W. Brenig (Taylor and Francis, London, 1974) P. 203.Google Scholar
  14. 14.
    A. M. Clark, M. H. Cohen, M. Campu andH. P. D. Lanyon,J. Non-Cryst. Solids 16 (1974) 117.Google Scholar
  15. 15.
    H. Mell, Thesis, University of Marburg (1973).Google Scholar
  16. 16.
    N. F. Mott andE. A. Davis, “Electron Processes in Non-Crystalline Materials” (Clarendon, Oxford, 1971).Google Scholar
  17. 17.
    B. Movaghar andL. Schweitzer,J. Phys. J. Phys. C 11 (1978) 125.Google Scholar
  18. 18.
    P. Delhaes, P. De Kepper andM. Uhlrich,Phil. Mag. 29 (1974) 1201.Google Scholar
  19. 19.
    P. Delhaes,Phys. Chem. Carbon 7 (1971) 193.Google Scholar
  20. 20.
    R. M. Mehra, Hemant Kumar, Surinder Koul andP. C. Mathur,Phys. Status Solidi (a) 83 (1984) 941.Google Scholar
  21. 21.
    R. M. Mehra, Hemant Kumar, Surinder Koul andPawan Sikka,Mater. Chem. Phys. 11 (1984) 481.Google Scholar
  22. 22.
    J. W. Jeffery, “Methods in X-ray crystallography” (Academic Press, London, 1971) p. 83.Google Scholar
  23. 23.
    K. Yosida,Phys. Rev. 107 (1957) 396.Google Scholar
  24. 24.
    E. T. Hedgcock andT. W. Raudorf,Solid State Commun. 8 (1970) 1819.Google Scholar
  25. 25.
    Y. Toyozawa,J. Phys. Soc. Jpn. 17 (1962) 986.Google Scholar
  26. 26.
    R. M. Mehra, S. C. Agarwal, Saurabh Rani Hemant Kumar andP. C. Mathur,J. Non-Cryst. Solids 69 (1985) 261.Google Scholar

Copyright information

© Chapman and Hall Ltd 1985

Authors and Affiliations

  • R. M. Mehra
    • 1
  • Hemant Kumar
    • 1
  • S. C. Agarwal
    • 1
  • Surinder Koul
    • 1
  • P. C. Mathur
    • 1
  1. 1.Department of Physics and AstrophysicsUniversity of DelhiDelhiIndia

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