• Impurity effects on the critical behaviour of the electrical resistance of binary liquid mixtures

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      https://www.ias.ac.in/article/fulltext/pram/012/05/0511-0522

    • Keywords

       

      Critical phenomena; binary systems; transport properties; critical indices; universality

    • Abstract

       

      The electrical resistance of the binary liquid system cyclohexane + acetic anhydride is measured, in the critical region, both in the pure mixture and when the mixture is doped with small amounts (≈ 100 ppm) of H2O/D2O impurities.Tc was approached to aboutt=3×10−6 wheret=(TTc)/Tc. The critical exponentb ≈ 0.35 in the fit of the resistance data to the equationdR/dTt−b does not seem to be affected appreciably by the impurities. There is a sign reversal ofdR/dt in the non-critical region. Binary liquid systems seem to violate the universality of the critical resistivity.

    • Author Affiliations

       

      Anil Kumar1 E S R Gopal1

      1. Department of Physics, Indian Institute of Science, Bangalore - 560 012
    • Dates

       
  • Pramana – Journal of Physics | News

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