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Colossal pressure-induced negative resistance change in La2/3Ca1/3MnO3 thin films

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Ca1/3MnO3 thin films as a function of temperature from 4 to 300 K are studied. The application of external pressure increases the temperature of the metal–insulator transition (TMI). For a film showing TMI at about 177 K, a colossal change in resisitivity (R(0)-R(p))/R(p) qualitatively comparable to the magnetoresistance (R(0)-R(B))/R(B) around the transition temperature, is observed. However, this change for the film with high TMI (267 K) is smaller by a factor of about 100. The increase of TMI with pressure is intimately associated with the pressure-induced contraction and alignment of Mn-O-Mn bonds and the possible enhancement of the double-exchange interaction with pressure.

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Authors and Affiliations

  1. Department of Physics, Brock University, St. Catharines, L2S 3A1, Canada, , , , , , CA

    T. Roch, S. Yaghoubzadeh & F.S. Razavi

  2. Max-Planck Institut für Festkörperforschung, Heisenbergstrasse 1, Postfach 80 06 65, D-70506 Stuttgart, Germany (Fax: +49-711/689-1389, E-mail: huh@servix.mpi-stuttgart.mpg.de), , , , , , DE

    B. Leibold, R. Praus & H.-U. Habermeier

Authors
  1. T. Roch
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  2. S. Yaghoubzadeh
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  3. F.S. Razavi
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  4. B. Leibold
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  5. R. Praus
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  6. H.-U. Habermeier
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Received: 11 September 1998/Accepted: 12 September 1998

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Roch, T., Yaghoubzadeh, S., Razavi, F. et al. Colossal pressure-induced negative resistance change in La2/3Ca1/3MnO3 thin films . Appl Phys A 67, 723–725 (1998). https://doi.org/10.1007/s003390050844

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  • DOI: https://doi.org/10.1007/s003390050844

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