• Electrical transport in La1−xCaxMnO3 thin films at low temperatures

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      https://www.ias.ac.in/article/fulltext/pram/058/05-06/1079-1083

    • Keywords

       

      La1−xCaxMnO3 thin films; electrical transport; low temperature resistivity; colossal magnetoresistance

    • Abstract

       

      We report here the low-temperature resistivity of the chemical solution deposited La1−xCaxMnO3 (x=0.2, 0.3 and 0.33) thin films on LaAlO3 substrates. The films were post-annealed in atmosphere at 850°C. The low temperature resistivity data has been studied in order to understand the nature of low-temperature conduction processes. The data showed T2 dependence from 60 K to 120 K consistent with the single magnon scattering process. The deviation from this quadratic temperature dependence at low temperatures is attributed to the collapse of the minority spin band. The two-magnon and electron-phonon processes contribute to scattering of carriers in the temperature range above 120 K.

    • Author Affiliations

       

      S Angappane1 K Sethupathi1 G Rangarajan1

      1. Physics Department, Low Temperature Laboratory, Indian Institute of Technology, Chennai - 600 036, India
    • Dates

       
  • Pramana – Journal of Physics | News

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