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Comparison of irreversibility temperatures determined via DC and AC magnetization techniques in conventional superconductors

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Abstract

A comparison has been made of irreversibility temperature determined by four different methods in few specimens of lead (type-I) and niobium (type-II). The merger ofM ZFC(T) andM FC(T) curves giveT r(H) values lower than those evident from vanishing the hysteresis in isothermal DC magnetization. The identification of peak temperature inx″ H (T) data withT r(H) is appropriate only if the contribution from changes in the normal state electrodynamics can be isolated and the peak is narrow. The appearance of differential paramagnetic effect inx′ H (T) data is adequate to imply reversibility, however, its efficacy to precisely locate irreversibility line remains to be established.

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Author notes

  1. A K Grover

    Present address: Institute of Fundamental Research, 400 005, Bombay, India

Authors and Affiliations

  1. Department of Physics, Panjab University, 160 014, Chandigarh, India

    A K Grover

  2. Tata Institute of Fundamental Research, 400 005, Bombay, India

    S Ramakrishnan, Ravi Kumar, P L Paulose & S K Malik

  3. Solid State Physics Division, Bhabha Atomic Research Centre, 400 085, Bombay, India

    P Chaddah

Authors
  1. A K Grover
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  2. S Ramakrishnan
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  3. Ravi Kumar
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  4. P L Paulose
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  5. S K Malik
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  6. P Chaddah
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Grover, A.K., Ramakrishnan, S., Kumar, R. et al. Comparison of irreversibility temperatures determined via DC and AC magnetization techniques in conventional superconductors. Pramana - J Phys 37, 525–538 (1991). https://doi.org/10.1007/BF02846783

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  • DOI: https://doi.org/10.1007/BF02846783

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