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Derivative Analysis of the High Temperature Superconducting Transition

  • Carmen Almasan (a1), J. Estrada (a1), C. P. Poole (a1), T. Datta (a1), H. A. Farach (a1), D. U. Gubser (a2), S. A. Wolf (a2) and L. E. Toth (a2)...

Abstract

The shape of the normalized temperature derivative of the dc susceptibility provides useful information about superconducting materials. We propose that the position of the derivative peak be defined as the transition temperature Tc and the width of this peak define its sharpness.

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[1] See typical examples in Extended Abstracts High Temperature Superconductors Symposium S. Ed. Gubser, D.U. and Schulter, M., Material Research Society, Pittsburgh (1987).
[2] Datta, T., Poole, C.P. Jr, Farach, H.A., Almasan, Carmen, Estrada, J., Gubser, D.U. and Wolf, S.A., (submitted for publication) USC preprint 1987.
[3] See Poole, Charles P. Jr, Electron Spin Resonance, 2nd Ed. John Wiley & Sons, NY (1983) and references therein.
[4] Datta, T., Almasan, C, Gubser, D.U., Wolf, S.A., Osofsky, M. and Toth, L.E., p. 817, Novel Superconductivity, Proc. of Int'l Workshop at Berkeley, CA, USA. Ed. Wolf, S.A. and Kresin, V.Z., Plenum, NY (1987).
[5] Qadri, S.B., Toth, L.E., Osofsky, M.S., Lawrence, S., Gubser, D.U. and Wolf, S.A., Phys. Rev. B35, 7235 (1987);
Skelton, E.F. et al. Phys. Rev. B35, 7140 (1987).
Rhyne, J.J. et al. Phys. Rev., 36, 2294 (1987).
[6] London, F., Superfluids, Vol. 1, Dover, NY (1961).
[7] Finnemore, D.K. et al., Phys. Rev. B 35, 5319 (1987).
Farrell, D.E. et al., Phys. Rev. B 35, 8797 (1987).

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