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      https://www.ias.ac.in/article/fulltext/pram/033/04/0513-0519

    • 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

       
      Published
      October 1989
      Manuscript received
      28 November 1988
      Manuscript revised
      10 April 1989

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