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    • Keywords


      Magnetic superconductor; Y9Co7; ac susceptibility; magnetization; critical exponents

    • Abstract


      Detailed measurements of magnetization and ac susceptibility at low temperatures of 1% Zr-substituted Y9Co7 are presented. All results are indicative of itinerant weak ferromagnetism withTc ∼ 9.5 K. The zero-field magnetizations followT2 orT4/3 behaviour as in the Ni-substituted system. The estimated critical exponents areβ=0.38±0.03,γ=1.16±0.05. It is argued that the main effect of the non-magnetic Zr-substitution in Y9Co7 is to stabilize the ferromagnetic ordering by suppressing the ‘hopping’ of Co atoms along thec-axis sites of the hexagonal structure.

    • Author Affiliations


      R Ranganathan1 J L Tholence1 2 B V B Sarkissian1 3

      1. Low Temperature Physics Section, Saha Institute of Nuclear Physics, 92, A.P.C. Road, Calcutta - 700 009, India
      2. C.R.T.B.T.-C.N.R.S., B.P. 156X, Grenoble Cedex - 38042, France
      3. Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay - 400 005, India
    • Dates

  • Pramana – Journal of Physics | News

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